Nest Scientific Consumables

Erlenmeyer Flasks Accessories

<h2 dir="ltr">&nbsp;What are Erlenmeyer Flask Accessories?</h2>
 Erlenmeyer flask accessories are the replacement caps, transfer cap assemblies, vent filters, and adapter fittings used alongside PC and PETG shake flasks to customize gas exchange, enable closed-system liquid transfer, and replace consumable caps between culture runs. Accessory selection determines whether a shake flask acts as a standard culture vessel, a sealed storage container, or a closed-system liquid transfer assembly in a cGMP workflow.
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<h2 dir="ltr">What you will find:</h2>
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<ul>
<li>Accessories compatible with high-efficiency Erlenmeyer flasks in 2 L, 3 L, and 5 L formats.</li>
<li>Available in bi-directional, inverted, and multifunctional transfer cap configurations.</li>
<li>Supports both standard-neck and wide-mouth 3 L flask designs.</li>
<li>Includes options with integrated silicon tubing for transfer applications.</li>
<li>Enables customization of flask workflows through interchangeable transfer cap accessories.</li>
</ul>
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<h2 dir="ltr">How to Choose Erlenmeyer Flask Accessories</h2>
 Vented Caps: Standard vs. Oversized Membrane Standard vented Erlenmeyer caps have a 0.22 &micro;m PTFE membrane in a small-diameter HDPE housing. NEST Scientific vented caps feature an oversized membrane area that increases the gas exchange surface, supporting higher oxygen mass transfer for dense suspension cultures at elevated shaker speeds. At 150 RPM with 20&ndash;25% fill, NEST oversized vented caps provide sufficient oxygen transfer for mammalian suspension cultures at densities up to approximately 5 &times; 10⁶ cells/mL. For cultures targeting densities above 10 &times; 10⁶ cells/mL in a standard shake flask format, a sparged bioreactor system is more appropriate. Plug Seal Caps: Autoclave vs. Non-Autoclave HDPE plug seal caps for NEST PC Erlenmeyer flasks are compatible with autoclave cycles at 121 &deg;C when loosened 1&ndash;1.5 turns before autoclaving to prevent steam pressure buildup. Plug seal caps for NEST PETG flasks are compatible with static incubation and transport but not autoclaving (PETG maximum temperature: +60 &deg;C). Confirm whether your accessory cap is rated for autoclave use before including it in a steam sterilization cycle. Transfer Cap Assemblies for Closed-System Culture NEST customized transfer cap assemblies combine an Erlenmeyer-compatible cap body with a bi-directional transfer port, TPE tubing, and a Luer lock or CPC connector &mdash; enabling aseptic inoculation, sampling, or media addition to a running shake flask culture without opening the flask. This closed-system capability is used in cGMP process development, GMP seed train management, and contamination-critical research workflows. Transfer caps are available in sizes matching NEST 125 mL, 250 mL, 500 mL, 1,000 mL, 2,000 mL, and 3,000 mL flask neck formats. Cap Sizing and Flask Compatibility Erlenmeyer flask caps are sized to the neck thread diameter of the flask. NEST Scientific PC and PETG Erlenmeyer flasks use proprietary screw-thread neck dimensions &mdash; confirm the specific cap catalog number matches your flask's neck size before ordering replacement caps. Do not mix cap brands across flask brands without verifying thread compatibility; mismatched caps create gas leaks at the vent membrane, contaminating cultures. Replacement Cap Frequency for Reusable PC Flasks For reusable PC flasks, replace the vented cap after each culture run to prevent membrane clogging from media splatter, condensation, and biofilm formation on the PTFE membrane. Reusing a contaminated or clogged vent membrane reduces gas exchange efficiency, creating a DO deficit that depresses cell growth without a visible contamination event. NEST vented caps for PC flasks are available in bulk packs for cost-efficient per-run replacement. 
<h2 dir="ltr"> Specifications Context</h2>
 NEST Scientific Erlenmeyer flask accessories &mdash; including replacement vented caps, plug seal caps, and transfer cap assemblies &mdash; are manufactured from USP Class VI HDPE (cap housing) and USP Class VI PTFE (0.22 &micro;m membrane), with TPE tubing in transfer assemblies. All accessory caps are sterile and non-pyrogenic per the lot certificate. The 0.22 &micro;m membrane pore size is the standard for microbial retention in cell culture venting applications. Transfer cap assemblies compatible with the NEST Erlenmeyer flask line are available in sizes for 125 mL through 3,000 mL flasks, individually wrapped in sterile packaging. NEST Scientific is ISO 9001:2015 and ISO 13485 certified.&nbsp; 
Power your scientific breakthroughs with high-precision labware.&nbsp;<a href="https://mbpinc.net/contact-us" title="the MBP team" style="color: #236fa1;">Contact the MBP team</a> today for bulk availability, technical specifications, and expert support.

Erlenmeyer Flask Accessories

DataSheet

3L High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap

NEST Scientific 3L HE Erlenmeyer Flask Bi-directional Transfer Cap Series: bi-directional transfer cap for 3 L High Efficiency Erlenmeyer Flasks with 50 cm TPE tube (1/8" ID, 1/4" OD) and 0.22 µm vent filter. Enables closed-system liquid transfer without cap removal. Sterile, 1/pk, 4/cs. Order at <a href="https://www.mbpinc.net/quickorder">mbpinc.net/quickorder</a>. Available in four tubing configurations: TPE 1/8″ ID 1/4″ OD (C10222-AZB050B), TPE 1/4″ ID 3/8″ OD (C10223-BZC050B), Silicone 1/4″ ID 3/8″ OD Male CPC (C10223-FBC050B), and Silicone 1/4″ ID 3/8″ OD Female CPC (C10223-FDC050B) — all sterile, 1/pk, 4/cs.

Manufacturer

3L High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with TPE Tube (50cm 1/8" ID 1/4" OD), Vent (0.22 μm Φ24mm), without Flask, Sterile, 1/pk, 4/cs

3L High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with TPE Tube (50cm 1/4" ID 3/8" OD), Vent Filter (0.22 μm Φ24mm), without Flask, Sterile, 1/pk, 4/cs

3L High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with Silicon Tube (50cm1/4" ID 3/8" OD), Male CPC Connector with Female Sealing Cap with, Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

3L High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with Silicon Tube (50cm1/4" ID 3/8" OD), Female CPC Connector with Male Sealing Cap with, Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

3L High Efficiency Erlenmeyer Flask Inverted Transfer Cap

NEST Scientific 3 L Inverted Transfer Cap is a sterile inverted transfer cap for 3 L High Efficiency Erlenmeyer Flasks — 50 cm TPE tube (1/8″ ID × 1/4″ OD), 0.22 μm vent filter (Φ42 mm), closed-system one-directional liquid transfer. Sold without flask. Sterile, 1/pk, 4/cs. Available for 1/8" ID or 1/4" ID tubing.

3L High Efficiency Erlenmeyer Flask Inverted Transfer Cap with TPE Tube (50cm 1/8" ID 1/4" OD), Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

3L High Efficiency Erlenmeyer Flask Inverted Transfer Cap with TPE Tube ( 50cm 1/4" ID 7/16" OD), Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

3L High Efficiency Erlenmeyer Flask Multifunctional Transfer Cap

3L High Efficiency Erlenmeyer Flask Multifunctional Transfer Cap by NEST Scientific — multifunctional transfer cap for 3 L high efficiency Erlenmeyer flasks. Includes 52 cm TPE tube (1/8&quot; ID &times; 1/4&quot; OD), integrated sampling nozzle, 0.22 &mu;m &times; 50 mm vent filter. Sterile, cap only, 1/pk, 4/cs. Available in three configurations: C10211-AJE052B (TPE 52cm, sampling nozzle, 0.22µm Φ50mm vent), C10211-DZB050B (TPE 50cm 1/4"ID, 0.22µm Φ24mm vent), C10211-GBB100B (silicone 100cm, Male CPC connector, 0.22µm Φ24mm vent).

3L High Efficiency Erlenmeyer Flask Multifunctional Transfer Cap with TPE Tube (52cm 1/8" ID 1/4" OD) and a Sampling Nozzle, Vent Filter (0.22 μm Φ50mm), without Flask, Sterile, 1/pk, 4/cs

3L High Efficiency Erlenmeyer Flask Multifunctional Transfer Cap with TPE Tube ( 50cm 1/4" ID 7/16" OD), Vent Filter (0.22 μm Φ24mm), without Flask, Sterile, 1/pk, 4/cs

3L High Efficiency Erlenmeyer Flask Multifunctional Transfer Cap with Silicon Tube (100cm 3/16" ID 3/8" OD), Male CPC Connector with Female Sealing Cap, Vent Filter (0.22 μm Φ24mm), without Flask, Sterile, 1/pk, 4/cs

Erlenmeyer Flasks

<h2 dir="ltr">What are Cell Culture Erlenmeyer Flasks?</h2>
 Cell culture Erlenmeyer flasks (also called shake flasks or conical flasks) are single-use, sterile plastic vessels with a conical body, flat base, and narrow neck used for suspension cell culture on orbital shakers and incubator shakers, microbial culture, and media preparation. Unlike rectangular T-flasks designed for static monolayer culture, Erlenmeyer flasks are engineered for shaking: their wide conical base maximizes liquid surface area for oxygen transfer, while the narrow neck minimizes evaporation and contamination risk. Choose PC Erlenmeyer flasks for autoclavable reuse and high-temperature media preparation; choose PETG for single-use suspension culture and processes requiring BPA-free materials.
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<h2 dir="ltr">What you will find:</h2>
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<a href="erlenmeyer-flasks/petg-erlenmeyer-flasks">PETG Erlenmeyer flasks: </a>strong choice for cell culture applications that need excellent clarity, reliable handling, and convenient single-use performance. They are lightweight, durable, and ideal for shaker culture, media preparation, and general suspension cell workflows.
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<a href="erlenmeyer-flasks/pc-erlenmeyer-flasks">PC Erlenmeyer flasks: </a>built for applications that require greater strength and higher impact resistance. They are well-suited for demanding lab environments, including vigorous shaking, transport, and workflows where added durability is important.
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<li dir="ltr" aria-level="1"><a href="https://mbpinc.net/consumables/cell-culture/erlenmeyer-flasks/erlenmeyer-flask-accessories">Erlenmeyer Flask Accessories: </a>Includes bi-directional, inverted, and multifunctional transfer caps, plus silicon tube assemblies for 2 L, 3 L, 3 L wide-mouth, and 5 L high-efficiency flasks, supporting sterile transfer and closed-system workflows.</li>
</ul>
<h2 dir="ltr"> How to Choose Erlenmeyer Flasks for Cell Culture</h2>
 PC vs. PETG Material PC (polycarbonate) Erlenmeyer flasks are autoclavable at 121 &deg;C (typically 5&ndash;10 cycles), shatter-proof, crystal-clear, and rated from &minus;135 &deg;C to +135 &deg;C. PC is ideal for labs that sterilize media or wash in-house. PC contains BPA. PETG Erlenmeyer flasks are single-use, BPA-free, rated from &minus;80 &deg;C to +60 &deg;C, and cannot be autoclaved. They provide a contamination-free, cleaning-free alternative to glass and PC for high-throughput suspension culture operations. Flat Base vs. Baffled Base Flat-base Erlenmeyer flasks provide gentler swirling for slow-growth cell lines and media mixing. Baffled-base flasks have three or four angled internal baffles that interrupt the swirling flow, increasing turbulence, raising dissolved oxygen (DO) by up to 2&times; compared to flat-base flasks at the same orbital speed, and reducing cell sedimentation. Baffled flasks are the standard for CHO-S, HEK293-F, Sf9, microbial, and yeast cultures requiring high oxygen transfer rates. NEST Scientific offers baffled and flat-base versions in both PC and PETG across all core volumes. Vented vs. Plug Seal Cap Vented caps contain a 0.22 &micro;m hydrophobic PTFE membrane that allows free O₂/CO₂ gas exchange while excluding microbial contamination. The NEST vented cap features an oversized vent area that improves gas exchange beyond standard-size membrane caps, supporting oxygen-demanding suspension cultures at higher cell densities. Plug seal caps create a fully sealed environment for media storage, static incubation, or transport outside the incubator. Always use vented caps for actively growing suspension cultures on an orbital shaker. Volume and Fill Ratio Erlenmeyer flasks should be filled to no more than 20&ndash;25% of the nominal flask volume for suspension shaker culture to maintain adequate headspace for oxygen transfer. A 500 mL flask running at 20% fill holds 100 mL of culture; a 1,000 mL flask holds 200 mL. Overfilling reduces oxygen transfer efficiency and creates foam that blocks the vented cap membrane. For media storage (no shaking), the fill volume can approach 80% of nominal. Shaker Compatibility NEST Scientific Erlenmeyer flasks (125 mL&ndash;3,000 mL) are compatible with standard laboratory orbital shakers, including those from Infors HT, New Brunswick Scientific (Innova), and Thermo Scientific MaxQ. Confirm flask neck O.D. and base diameter against your shaker's flask holder clips or clamp system before ordering large quantities. 
<h2 dir="ltr"> Specifications Context</h2>
 NEST Scientific PC Erlenmeyer flasks are manufactured from USP Class VI medical-grade polycarbonate, gamma sterilized per ISO 11137 to SAL 10⁻⁶, and individually wrapped in sterile packaging. PETG Erlenmeyer flasks are E-beam sterilized and certified DNase/RNase-free, pyrogen-free per lot. Vented cap PTFE membranes are 0.22 &micro;m with an oversized vent area that increases gas exchange efficiency vs. standard-diameter membrane caps. NEST Scientific is ISO 9001:2015 and ISO 13485 certified with FDA registration. Flask catalog sizes extend to high-efficiency 2 L and 5 L PC formats (NEST High Efficiency Erlenmeyer Flask line) for production-scale suspension culture. MBP stocks the NEST Scientific Erlenmeyer flask line across all major volumes and configurations. 
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Support accurate mixing and culturing with premium Erlenmeyer flasks designed for modern laboratories. <a href="https://www.mbpinc.net/contact-us" title="Contact the MBP Team" style="color: #236fa1; text-decoration: underline;">Contact the MBP team</a>&nbsp;for a formal quote.

<h2 dir="ltr">What are PC Erlenmeyer Flasks?</h2>
 PC (polycarbonate) Erlenmeyer flasks are autoclavable, shatter-proof, optically clear shake flasks manufactured from USP Class VI medical-grade polycarbonate for suspension cell culture, microbial fermentation, and media preparation on orbital shakers. Polycarbonate provides a working temperature range of &minus;135 &deg;C to +135 &deg;C and withstands 5&ndash;10 autoclave cycles at 121 &deg;C &mdash; the defining advantage of PC over PETG for labs that steam-sterilize media or require reusable, re-sterilizable shake flasks. PC Erlenmeyer flasks are the correct choice when autoclavability, reuse, or processing at elevated temperature (&gt;60 &deg;C) is required; for single-use BPA-free workflows, PETG Erlenmeyer flasks are the alternative.
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<h2 dir="ltr">What you will find:</h2>
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Vent Filter Caps featuring 0.22&micro;m hydrophobic membranes to facilitate continuous, sterile gas exchange while preventing contamination and evaporation.
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Seal Caps designed for airtight liquid storage, transport, and non-aerated incubation steps.
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Flat Bottom Flasks optimized for uniform heating and stability on standard orbital shakers.
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Baffled Bottom Flasks engineered with integrated "flutes" to increase turbulence and oxygen mass transfer, ideal for high-density yeast and bacterial cultures.
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Volume Scalability with a comprehensive range from 125mL pilots to 5L high-efficiency production vessels, allowing for a seamless transition from bench-scale research to bulk bioprocessing.
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High-Efficiency Wide-Mouth Designs facilitate&nbsp;rapid filling and easy access for large-volume pipetting and automated dispensers.
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<h2 dir="ltr"> How to Choose PC Erlenmeyer Flasks</h2>
 Flat Base vs. Baffled Base for Your Cell Line Flat-base PC flasks produce laminar rotational flow during orbital shaking, providing low-shear mixing appropriate for shear-sensitive primary cells, some hybridoma lines, and media preparation. Baffled-base PC flasks generate turbulence during shaking that substantially increases dissolved oxygen (DO) transfer &mdash; critical for fast-growing CHO-S, HEK293-F, Expi293, bacterial (E. coli, B. subtilis), and yeast cultures where DO depletion limits cell density and productivity. NEST Scientific offers both base geometries across all standard volumes from 125 mL to 3,000 mL, with High Efficiency baffled formats extending to 5,000 mL for production-scale operations. Vented Cap vs. Plug Seal Cap Vented caps (0.22 &micro;m hydrophobic PTFE membrane, HDPE housing) allow continuous gas exchange during shaker culture while maintaining a sterile barrier. The NEST oversized vented cap membrane provides greater gas transfer area than standard-dimension vented caps, supporting high-density cultures. Plug seal caps are gas-impermeable HDPE caps used for static media storage in PC flasks, transport between incubators, and autoclave cycles (caps must be loosened 1&ndash;1.5 turns before autoclaving to prevent pressure buildup). Never use a sealed plug cap on a flask in an orbital shaker incubator &mdash; medium acidification and DO depletion occur within hours. Volume Selection and Fill Ratio NEST Scientific PC flasks are available in 125 mL, 250 mL, 500 mL, 1,000 mL, 2,000 mL, 3,000 mL, and 5,000 mL (High Efficiency). Working fill for shaker culture: 20&ndash;25% of nominal volume. Working volumes: 25&ndash;30 mL in 125 mL; 50&ndash;60 mL in 250 mL; 100&ndash;125 mL in 500 mL; 200&ndash;250 mL in 1,000 mL; 400&ndash;500 mL in 2,000 mL. Scale-up from T-flask to Erlenmeyer: transition from T75 (15&ndash;25 mL static) to a 125 mL PC baffled flask when moving to suspension-adapted cell lines requiring orbital shaking. Autoclave Protocol for PC Flasks PC Erlenmeyer flasks can be autoclaved at 121 &deg;C for 15&ndash;20 minutes (standard gravity cycle). Loosen cap 1&ndash;1.5 turns before autoclaving; retighten after cooling. Repeated autoclaving causes progressive hydrolytic degradation of carbonate linkages &mdash; inspect for crazing, discoloration, or dimensional distortion after each cycle and retire flask at first sign of damage. Do not use autoclaved PC flasks for vacuum applications. BPA Consideration Polycarbonate contains bisphenol A (BPA) as an inherent part of its monomer chemistry. For applications involving estrogen receptor&ndash;positive cell lines (MCF-7, T47D, ZR-75), primary endocrine cells, or long-term culture runs exceeding 14 days, PETG Erlenmeyer flasks (BPA-free) are the safer choice. For standard bacterial, yeast, CHO, and HEK293 suspension culture, trace BPA from USP Class VI PC does not affect results in published culture protocols. 
<h2 dir="ltr"> Specifications Context</h2>
 NEST Scientific PC Erlenmeyer flasks are manufactured from USP Class VI medical-grade PC resin in ISO 8 cleanrooms, gamma sterilized per ISO 11137 to SAL 10⁻⁶, and individually wrapped in sterile packaging. PC tensile strength: 55&ndash;75 MPa; maintains impact resistance &gt;50 J/m at &minus;40 &deg;C. Vented cap 0.22 &micro;m hydrophobic PTFE membrane confirmed non-pyrogenic. Flask base diameter and neck geometry are designed for compatibility with standard orbital shaker clips from Infors HT, New Brunswick Innova, and Thermo Scientific MaxQ platforms &mdash; confirm flask O.D. against your specific shaker clamp before bulk ordering. NEST Scientific PC Erlenmeyer flasks up to 5 L (High Efficiency line) are stocked by MBP.
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Connect with the <a href="https://mbpinc.net/contact-us" title="MBP team" style="color: #236fa1; text-decoration: underline;">MBP team</a> today to secure the exact volumes and cap configurations required for your laboratory&rsquo;s next breakthrough.

PC Erlenmeyer Flasks

Flyer

3L PC Wide-mouth High Efficient Erlenmeyer Flasks

NEST Scientific 3L wide-mouth PC Erlenmeyer flasks, E-beam SAL 10⁻⁶, USP Class VI, autoclavable. Four variants: baffled seal cap (786505), baffled vent cap (786515), flat-base seal cap (786501), flat-base vent cap (786511). DNase/RNase-free. 1/pk, 4/cs.

3L PC Wide-mouth High Efficient Erlenmeyer Flask, with Baffles, Seal Cap, Sterile, 1/pk, 4/cs

3L PC Wide-mouth High Efficient Erlenmeyer Flask, with Baffles, Vent Filter Cap, Sterile, 1/pk, 4/cs

3L PC Wide-mouth High Efficient Erlenmeyer Flasks, Flat Base, Seal Cap, Sterile, 1/pk, 4/cs

3L PC Wide-mouth High Efficient Erlenmeyer Flasks, Flat Base, Vent Filter Cap, Sterile, 1/pk, 4/cs

3L Wide-mouth High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap

NEST 3L wide-mouth baffled Erlenmeyer bi-directional transfer caps (cap only, without flask). Four variants: TPE 1/8 inch ID (C10322-AZB050B), TPE 1/4 inch ID (C10323-BZC050B), silicone 1/4 inch male CPC Φ42 mm vent (C10323-FBC050B), silicone 1/4 inch female CPC (C10323-FDC050B). Sterile, 0.22 µm vent. 1/pk, 4/cs.

3L Wide-mouth High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with TPE Tube (50cm 1/8" ID 1/4" OD), Vent Filter (0.22 μm Φ24mm), without Flask, Sterile, 1/pk, 4/cs

3L Wide-mouth High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with TPE Tube (50cm 1/4" ID 3/8" OD), Vent Filter (0.22 μm Φ24mm), without Flask, Sterile, 1/pk, 4/cs

3L Wide-mouth High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with Silicon Tube (50cm1/4" ID 3/8" OD), Male CPC Connector with Female Sealing Cap with, Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

3L Wide-mouth High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with Silicon Tube (50cm1/4" ID 3/8" OD), Female CPC Connector with Male Sealing Cap with, Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

3L Wide-mouth High Efficiency Erlenmeyer Flask Inverted Transfer Cap

The 3L Wide-mouth High Efficiency Erlenmeyer Flask Inverted Transfer Cap by NEST Scientific is a sterile single-use inverted transfer cap (cap only, 1/pk, 4/cs) for closed aseptic liquid transfer. Two configurations: C10331-AZC050B (TPE 50 cm 1/8&#34; ID, 0.22 μm Φ42 mm vent filter) and C10333-DZC050B (TPE 50 cm 1/4&#34; ID, 0.22 μm Φ42 mm vent filter); E-beam SAL 10&#8315;&#8706;, ISO 13485.

3L Wide-mouth High Efficiency Erlenmeyer Flask Inverted Transfer Cap with TPE Tube (50cm 1/8" ID 1/4" OD), Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

3L Wide-mouth High Efficiency Erlenmeyer Flask Inverted Transfer Cap with TPE Tube (50cm 1/4" ID 7/16" OD), Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

3L Wide-mouth High Efficiency Erlenmeyer Flask Multifunctional Transfer Cap

NEST Scientific 3L Wide-Mouth Erlenmeyer Flask Multifunctional Transfer Cap Series: multifunctional transfer cap for 3 L wide-mouth High Efficiency Erlenmeyer Flasks with 52 cm TPE tube (1/8" ID, 1/4" OD), integrated sampling nozzle, and 0.22 µm vent filter (Φ50 mm). Closed-system liquid transfer and in-process sampling without flask opening. Sterile, 1/pk, 4/cs. Order at <a href="https://www.mbpinc.net/quickorder">mbpinc.net/quickorder</a>. Available in three tubing configurations: TPE 1/8″ ID 1/4″ OD with sampling nozzle (C10311-AJE052B), TPE 1/4″ ID 7/16″ OD (C10311-DZB050B), and Silicone 3/16″ ID 3/8″ OD with Male CPC (C10311-GBB100B) — all sterile, 1/pk, 4/cs.

3L Wide-mouth High Efficiency Erlenmeyer Flask Multifunctional Transfer Cap with TPE Tube (52cm 1/8" ID 1/4" OD) and a Sampling Nozzle, Vent Filter (0.22 μm Φ50mm), without Flask, Sterile, 1/pk, 4/cs

3L Wide-mouth High Efficiency Erlenmeyer Flask Multifunctional Transfer Cap with TPE Tube ( 50cm 1/4" ID 7/16" OD), Vent Filter (0.22 μm Φ24mm), without Flask, Sterile, 1/pk, 4/cs

3L Wide-mouth High Efficiency Erlenmeyer Flask Multifunctional Transfer Cap with Silicon Tube (100cm 3/16" ID 3/8" OD), Male CPC Connector with Female Sealing Cap, Vent Filter (0.22 μm Φ24mm), without Flask, Sterile, 1/pk, 4/cs

PETG Bottle Accessories

<h2 dir="ltr">What are PETG Bottles with Accessories?</h2>
 PETG bottles with accessories are sterile, closed-system liquid storage and transfer assemblies combining a square PETG (polyethylene terephthalate glycol-modified) media bottle with a bi-directional transfer cap pre-fitted with TPE (thermoplastic elastomer) tubing and a terminal connector &mdash; Luer lock (male or female) or CPC (clamped pressure connector). The closed system allows aseptic media, serum, buffer, or pharmaceutical intermediate transfer between containers without open-pour steps, substantially reducing contamination risk and compliance burden in cGMP-regulated and BSL-2 laboratory environments.&nbsp; Choose PETG bottle assemblies for any liquid transfer workflow requiring an aseptic closed system &mdash; cGMP media dispensing, FBS aliquoting under sterile barrier, viral vector transfer, or pharmaceutical intermediate handling where open-pour steps are prohibited by SOP or regulatory requirement.
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<h2 dir="ltr">What you will find:</h2>
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1/4" ID TPE Tubing Systems with Female Luer Lock connectors
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1/4" ID TPE Tubing Systems with Male CPC connectors
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1/8" ID TPE Tubing Systems for precision fluid transfer
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1/8" ID TPE Tubing Systems with Female Luer Lock connectors
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1/8" ID TPE Tubing Systems with Male CPC connectors
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0.22&mu;m Vent Filter Assemblies for sterile pressure equalization
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Aseptic Transfer Caps with integrated sealing plugs
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Customizable Tubing Sets for closed-loop systems
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<h2 dir="ltr"> How to Choose PETG Bottle Assemblies</h2>
 Connector Type: Luer Lock vs. CPC Female Luer lock connectors (catalog 352503, 352506 series) mate with male Luer tips on syringe filters, tubing sets, and sterile sampling devices &mdash; the most common connector for inline sterile sampling and small-volume aseptic transfer. Male Luer lock connectors fit female Luer receptacles on peristaltic pump tubing and fluid path assemblies. CPC (clamped pressure connector, also called quick-connect) connectors provide a tool-free, dry-disconnect coupling between two fluid lines without dripping &mdash; used in bioreactor harvest lines, media feed assemblies, and bioprocess fluid path management. Tubing Size: 1/8" vs. 1/4" I.D. NEST assemblies are available with 60 cm TPE tubing in 1/8" I.D. &times; 1/4" O.D. (for low-flow, small-volume transfer with syringe or peristaltic pump at low speed) or 1/4" I.D. &times; 3/8" O.D. (for higher-flow transfer with standard peristaltic pumps). The 3/8" O.D. tubing is the standard for most bioprocess peristaltic pumps. Confirm pump head bore size against tubing O.D. before ordering. Bi-Directional vs. Standard Cap The bi-directional transfer cap in NEST PETG assemblies has a dual-port design: one port connects to the TPE transfer tubing (outflow or inflow path), and the cap as a whole seals the bottle neck during the non-transfer state. This design allows the bottle to function both as a source vessel (liquid out via tubing) and a receiver vessel (liquid in via tubing) without changing the cap assembly. Confirm whether your process requires one-way or two-way transfer before selecting the assembly format. Volume Options NEST PETG bottle assemblies are available in 250 mL, 500 mL, and 1,000 mL volumes, matching standard media, sera, and buffer kit sizes. The 250 mL assembly is standard for small-volume cGMP process sampling; 500 mL and 1,000 mL assemblies suit bulk media dispense and FBS aliquoting at scale. Standard Bottle vs. Assembly For applications that do not require tubing or connectors &mdash; routine cold storage of media, FBS thaw, and buffer archiving &mdash; standard NEST PETG square bottles with HDPE screw caps (catalog 352xxx without accessories) are available at a lower cost. The accessory assembly format is only necessary when closed-system transfer between containers is required.
<h2 dir="ltr"> Specifications Context</h2>
 NEST Scientific PETG bottle assemblies are manufactured under a cGMP quality system conforming to ISO 13485 and 21 CFR 820 (QSR). All components are USP Class VI; the complete assembly is gamma irradiated in the USA to SAL 10⁻⁶ and provided in double-bagged sterile packaging for cleanroom entry. Each lot is tested and certified free of endotoxins, pyrogens, DNase, RNase, and particulates. PETG material: USP Class VI, temperature range &minus;80 &deg;C to +60 &deg;C; TPE tubing: USP Class VI, biocompatible, platinum-cured equivalent. The bi-directional cap body is polycarbonate (PC); the tubing and connector are TPE and polypropylene (PP) or nylon, all USP Class VI. As of 2026, NEST PETG bottle assemblies are used in cGMP biopharmaceutical manufacturing, viral vector production (lentivirus, AAV), FBS aliquoting under sterile barrier, and academic cGMP pilot programs. 
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Maintain the highest standards of aseptic integrity with our specialized assemblies. <a href="https://mbpinc.net/contact-us">Reach out to the experts</a> at Molecular Biology Products Inc. for a quote and keep your fluid handling error-free.

PETG Bottle With Accessories

Product Literature

500mL PETG Square Storage Bottle Transfer Cap

NEST Scientific 500mL PETG Square Storage Bottle Transfer Cap Series: 500 mL PETG square storage bottle with bi-directional transfer cap, 60 cm Saint-Gobain TPE tube (1/4" ID, 3/8" OD), MPC connector, 0.22 µm PTFE vent filter. E-beam sterile SAL 10⁻⁶, ISO 7 cleanroom, USP VI. 1/pk, 10/cs. Order at <a href="https://www.mbpinc.net/quickorder">mbpinc.net/quickorder</a>. Available in four configurations: two tube sizes (1/4″ ID 3/8″ OD or 1/8″ ID 1/4″ OD) each with Male CPC or Female Luer Lock connector — all sterile, 1/pk, 10/cs.

500mL PETG Square Storage Bottle Transfer Cap, TPE Tube (60 cm 1/4" ID 3/8" OD), Male CPC Connector with Female Sealing Cap, Vent Filter (0.22 μm Φ24mm), without Bottle, Sterile, 1/pk, 10/cs

500mL PETG Square Storage Bottle Transfer Cap, TPE Tube (60cm 1/4" ID 3/8" OD), Female Luer Lock Connector with Luer plug, Vent Filter (0.22 μm Φ24mm), without Bottle, Sterile, 1/pk, 10/cs

500mL PETG Square Storage Bottle Transfer Cap, TPE Tube (60cm 1/8" ID 1/4" OD), Male CPC Connector with Female Sealing Cap, Vent Filter (0.22 μm Φ24mm), without Bottle, Sterile, 1/pk, 10/cs

500mL PETG Square Storage Bottle Transfer Cap, TPE Tube (60cm 1/8" ID 1/4" OD), Female Luer Lock Connector with Luer Plug, Vent Filter (0.22 μm Φ24mm), without Bottle, Sterile, 1/pk, 10/cs

PETG Square Bottles

<h2 dir="ltr">What are PETG Square Media Bottles?</h2>
 PETG square media bottles are single-use, sterile, square-footprint containers manufactured from glycol-modified polyethylene terephthalate (PETG) for storing tissue culture media, fetal bovine serum, PBS, HBSS, buffers, pharmaceutical intermediates, and pH-sensitive aqueous solutions. The square profile reduces cold-room and refrigerator footprint by approximately 25% compared to equivalent-volume round bottles, and flat sides prevent rolling during transport. PETG square bottles are the correct choice over PET when low-temperature stability to &minus;80 &deg;C is needed, when wall durability under cold-room handling is critical, or when closed-system accessory cap assemblies will be used for aseptic liquid transfer.
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<h2 dir="ltr">What you will find:</h2>
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30mL PETG Bottles &ndash; For micro-scale aliquots and stock sampling.
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60mL PETG Bottles &ndash; Compact size for small-volume buffer storage.
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125mL PETG Bottles &ndash; Standard size for routine media prep.
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250mL PETG Bottles &ndash; Ideal for general cell culture storage.
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500mL PETG Bottles &ndash; Optimized for mid-volume biological fluids.
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1000mL PETG Bottles &ndash; For bulk reagent storage and stock solutions.
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2000mL PETG Bottles &ndash; High-capacity for industrial-scale liquid handling.
</li>
</ul>
<h2 dir="ltr"> How to Choose PETG Square Media Bottles</h2>
 PETG vs. PET vs. PC PETG and PET are chemically similar but differ in crystallinity. PETG's glycol modification reduces polymer crystallinity, improving impact resistance, flexibility, and low-temperature stability. PETG is rated from &minus;80 &deg;C to +60 &deg;C; PET from &minus;60 &deg;C to +60 &deg;C; PC from &minus;135 &deg;C to +135 &deg;C. PETG and PET are both BPA-free and non-autoclavable. PC is autoclavable but BPA-containing. For low-temperature archival storage of serum, enzymes, and viral stocks below &minus;60 &deg;C, PETG is the appropriate single-use choice. Volume Selection by Application The 30 mL and 60 mL bottles suit single-use serum aliquots, enzyme dilutions, and small-scale media preparation for T25 or T75 flasks. The 125 mL and 250 mL formats cover standard T75 and T175 media changes. The 500 mL bottle aligns with standard FBS lot sizes and 500 mL media kit volumes. The 1,000 mL bottle stores a full 1 L media preparation or 1 L FBS aliquot. Each bottle includes 15% headspace above nominal volume for expansion during freezing and thawing. Graduated Markings: Molded vs. Printed NEST Scientific PETG square bottles feature molded graduations (not printed), which remain legible through repeated freeze-thaw cycles, solvent exposure, and autoclave label-remover use. Printed graduations on competing formats can abrade or smear over time. Molded graduations are an important quality checkpoint when selecting PETG bottles for long-term archival. Cap Design NEST PETG square bottle caps are HDPE, designed through a one-shot mold process without an inner gasket. The gasket-free design eliminates a potential leachable point and produces a tighter, more consistent seal under the torque applied during manual capping in a cold room or gloved biosafety cabinet environment. The external collar design provides a secure grip for easy sealing under gloves. Double-Bagged GMP Packaging NEST PETG square media bottles are available in double-bagged sterile packaging, meeting material entry requirements for GMP cleanrooms and ISO-classified bioprocess areas. Each inner bag is heat-sealed; the outer bag provides additional sterility protection against outer packaging damage during courier transit. Standard Bottle vs. Accessory Assembly For routine media and serum cold storage, standard PETG square bottles with HDPE screw caps are the appropriate, cost-effective format. When closed-system aseptic liquid transfer between containers is required &mdash; cGMP media dispensing, viral stock aliquoting, pharmaceutical intermediate handling &mdash; choose NEST PETG bottles with bi-directional transfer cap assemblies (TPE tubing + Luer lock or CPC connector). 
<h2 dir="ltr"> Specifications Context</h2>
 NEST Scientific PETG square media bottles are manufactured from 100% virgin PETG resin in ISO 8 (Class 10,000) cleanrooms. Both PET and PETG materials meet USP Class VI and USP &lt;661&gt; biocompatibility requirements and ISO 10993 quality system standards per NEST lot certificates. E-beam sterilization achieves SAL 10⁻⁶. Smooth inner surface minimizes liquid residue on the wall. Operating temperature: &minus;80 &deg;C to +60 &deg;C. HDPE cap is heavy-metal-free per regulatory testing. Shelf life: 3 years from production month. As of 2026, NEST Scientific is ISO 9001:2015 and ISO 13485 certified with FDA registration. 
In a field where a single leak can ruin weeks of data, precision is everything. <a href="https://mbpinc.net/contact-us" style="color: #236fa1; text-decoration: underline;">Contact the Molecular Biology Products Inc. team</a> for a quote and ensure your closed-system transfers stay flawless.

500mL PETG Square Storage Bottle with Bi-directional Transfer Cap

NEST 500 mL PETG square storage bottles with bi-directional transfer cap, 0.22 µm vent filter, 60 cm TPE tubing. Five variants by tubing size and connector: 1/4" ID CPC (C51021-BBB060A), 1/4" ID Luer lock (C51021-BHB060A), 1/4" ID heat seal (C51021-DZB060A), 1/8" ID CPC (C51022-AAB060A), 1/8" ID Luer lock (C51022-AGB060A). Sterile, BPOG-validated. 1/pk, 10/cs.

500mL PETG Square Storage Bottle with Bi-directional Transfer Cap with TPE Tube (60cm 1/4" ID 3/8" OD), Male CPC Connector with Female Sealing Cap, Vent Filter (0.22 μm Φ24mm), Sterile, 1/pk, 10/cs

500mL PETG Square Storage Bottle with Bi-directional Transfer Cap with TPE Tube (60cm 1/4" ID 3/8" OD), Female Luer Lock Connector with Luer Plug, Vent Filter (0.22 μm Φ24mm), Sterile, 1/pk, 10/cs

500mL PETG Square Storage Bottle with Bi-Directional Transfer Cap with TPE Tube (60cm 1/4" ID 7/16" OD), Heat seal ,Vent Filter (0.22 μm 4.5cm²), Sterile, 1/pk, 10/cs

500mL PETG Square Storage Bottle with Bi-directional Transfer Cap with TPE Tube (60cm 1/8" ID 1/4" OD), Male CPC Connector with Female Sealing Cap, Vent Filter (0.22 μm Φ24mm), Sterile, 1/pk, 10/cs

500mL PETG Square Storage Bottle with Bi-directional Transfer Cap with TPE Tube (60cm 1/8" ID 1/4" OD), Female Luer Lock Connector with Luer Plug, Vent Filter (0.22 μm Φ24mm), Sterile, 1/pk, 10/cs

High Volume Centrifuge Tubes

<h2 data-section-id="155qizo" data-start="0" data-end="33">What Are All Centrifuge Tubes?</h2>
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The All Centrifuge Tubes collection includes the complete range of tube sizes commonly used in research, clinical, and laboratory environments. These tubes range from small 0.5 mL and 1.5&ndash;2 mL microtubes used in microcentrifuge applications to 5 mL and 10 mL midi tubes for intermediate sample volumes, as well as 15 mL and 50 mL conical tubes designed for cell culture, density gradient preparation, and larger-volume sample processing. They are available in polypropylene (PP) for enhanced chemical resistance and temperature tolerance or polystyrene (PS) for improved optical clarity.
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What you will find:
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<ul>
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<a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes/microcentrifuge-tubes" title="Microcentrifuge Tubes">Microcentrifuge Tubes</a> &ndash; Precision-engineered for small-volume sample preparation.
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<a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes/screw-cap-tubes" title="Screw Cap Tubes">Screw Cap Tubes</a> &ndash; Secure, leak-proof closures for long-term storage and transport.
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<a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes/15ml-and-50ml-centrifuge-tubes" title="15ml &amp; 50ml Centrifuge Tubes">15ml &amp; 50ml Centrifuge Tubes</a> &ndash; Standard conical bottom tubes for large-volume processing.
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<a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes/midicentrifuge-tubes-5ml-and-10ml" title="Midicentrifuge Tubes (5ml &amp; 10ml)">Midicentrifuge Tubes (5ml &amp; 10ml)</a> &ndash; The perfect bridge for intermediate sample sizes.
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<a href="https://mbpinc.net/consumables/centrifuge-tubes/all-centrifuge-tubes/microtubes-box" title="Microtubes Box">Microtubes Box</a> &ndash; Durable storage racks for organized sample management and protection.
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</ul>
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<h2 data-section-id="1f93yys" data-start="914" data-end="963">How to Choose From All Centrifuge Tube Formats</h2>
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Volume and Rotor Compatibility
Selecting the correct tube size is essential for safe and efficient centrifugation. Microtubes ranging from 0.5&ndash;2 mL are designed for microcentrifuges, while 5&ndash;10 mL midi tubes fit compatible benchtop centrifuge rotors. Larger 15 mL and 50 mL conical tubes are commonly used in clinical and research centrifuges. Always verify rotor compatibility before introducing a new tube format into your workflow.
Sterility Requirements
For sensitive applications such as RNA extraction, cell culture, and clinical diagnostics, sterile tubes certified free of RNase, DNase, and pyrogens are recommended. Non-sterile tubes can provide a cost-effective solution for routine DNA analysis, protein assays, and general sample storage where sterility is not critical.
Material Selection
Polypropylene tubes offer excellent durability, can be autoclaved at 121 &deg;C, and resist many laboratory chemicals and solvents. Polystyrene tubes provide superior transparency, making it easier to monitor liquid levels and sample contents, although they are less resistant to heat and solvents.
Packaging and Inventory Planning
Microtubes are commonly available in pack sizes ranging from 500 to 1,000 units, while 15 mL and 50 mL conical tubes are often supplied in cases of 500. Laboratories with consistent usage may benefit from establishing recurring purchase orders to ensure uninterrupted supply.
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<h2 data-section-id="urfo3f" data-start="2395" data-end="2433">Compare Centrifuge Tube Size Groups</h2>
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Microtubes (0.5&ndash;2 mL) are primarily used for PCR preparation, microcentrifuge applications, and storage of small sample volumes. These are typically manufactured from polypropylene and are available in pack sizes of 500&ndash;1,000 units.
Midi tubes (5&ndash;10 mL) support intermediate-volume centrifugation and supernatant collection. They are commonly made from polypropylene and supplied in packs ranging from 100&ndash;500 units.
15 mL conical tubes are widely used for cell pelleting, RNA isolation, and clinical sample processing. They are available in both polypropylene and polystyrene formats and are generally packaged in cases of 500.
50 mL conical tubes are designed for larger-volume workflows, including tissue culture, density gradient preparation, and sample processing. Like 15 mL tubes, they are available in polypropylene and polystyrene and are commonly sold in cases of 500.
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<h2 data-section-id="1ezckh3" data-start="3318" data-end="3348">Specifications and Features</h2>
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Globe Scientific and Nest Scientific centrifuge tubes are manufactured from USP Class VI virgin polypropylene or polystyrene resin and are certified free from detectable RNase, DNase, and pyrogens. Sterile products are irradiated using gamma or E-beam methods to achieve a sterility assurance level (SAL) of 10⁻⁶. MBP offers both racked and bagged formats for 15 mL and 50 mL conical tubes, along with dispenser-box options for selected microtube product lines that support efficient use in high-throughput laboratory environments.
For procurement teams, MBP accepts purchase orders and offers institutional pricing for bulk and high-volume purchases. <a href="https://mbpinc.net/contact-ushttps://mbpinc.net/contact-us" title="Contact the MBP team" style="color: #236fa1;">Contact the MBP team</a> today to learn more

All Centrifuge Tubes

<h2 data-section-id="hcowtr" data-start="0" data-end="45">What Are 15 mL and 50 mL Centrifuge Tubes?</h2>
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15 mL and 50 mL centrifuge tubes are conical-bottom vessels in polypropylene (PP) or polystyrene (PS), the two most commonly used tube formats in research and clinical laboratories worldwide. The 15 mL tube is the standard for cell pelleting, RNA isolation, small-scale protein purification, and clinical sample preparation. The 50 mL tube handles larger culture volumes, gradient preparation, tissue homogenate clarification, and bulk precipitation steps. Both formats from Globe Scientific and Nest Scientific are rated to 12,000&ndash;15,000 &times; g in a supported rotor.
15 mL for cell and molecular workflows under 12 mL; 50 mL for culture volumes, gradients, and any prep where a 15 mL conical runs out of headroom.
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<h2 dir="ltr">What you will find:</h2>
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<ul>
<li>Attached flat top screw cap: Leak-proof, one-hand use</li>
<li>Racked: Pre-organized for high-throughput</li>
<li>Self-standing: Stable skirted base</li>
<li>Sterile: For contamination-sensitive work</li>
<li>Non-sterile: General, cost-effective use</li>
<li dir="ltr" role="presentation">Bulk: High-volume, economical</li>
<li dir="ltr" role="presentation">Racked: Organized &amp; ready-to-use</li>
<li dir="ltr" role="presentation">PS racked: Extra stability with polystyrene racks</li>
</ul>
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<h2 data-section-id="1j0vxh6" data-start="772" data-end="821">How to Choose 15 mL and 50 mL Centrifuge Tubes</h2>
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Material: PP vs PS
Polypropylene tubes (Globe Scientific, Nest Scientific) are resistant to most organic solvents, stable from &minus;80 &deg;C to +121 &deg;C, and autoclavable. Polystyrene tubes offer greater optical clarity &mdash; the tube wall is transparent enough to read the sample meniscus and assess pellet quality without removing the tube from the rack. Choose PS when visual inspection is a workflow step; choose PP for all other applications.
Sterility Grade
Sterile tubes (gamma- or E-beam-irradiated, RNase-free, DNase-free, non-pyrogenic) are required for RNA work, primary cell culture, and clinical sample handling. Non-sterile, DNase/RNase-free tubes are appropriate and more cost-effective for DNA extractions, protein assays, and general preparative spins.
Cap Style: Flat-Top vs Plug-Seal
Flat-top screw caps (high-density polyethylene, HDPE) provide a flat writing surface for sample labeling and a double-threaded design that reduces cross-threading in high-throughput workflows. Plug-seal screw caps (HDPE or PP) create a secondary internal seal for leak-prone applications. Attached caps come pre-assembled on sterile tubes; separate caps are standard on non-sterile tubes.
Pack Format: Racked vs Bagged
Racked tubes (foam or PS rack, 50 &times; 15 mL or 25 &times; 50 mL per rack, 500 per case) allow direct pipetting without removing tubes and enable viewing of graduations without disturbing the rack. Bagged tubes (25 or 50 per bag, 500 per case) offer a lower cost per tube and suit labs with robotic liquid handlers or in-house racking systems.
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<h2 data-section-id="up19i6" data-start="2392" data-end="2431">Compare 15 mL and 50 mL Tube Options</h2>
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Globe Scientific 15 mL polypropylene tubes with flat-top blue caps are available in both sterile and non-sterile formats with attached or separate caps. These tubes can be purchased in racked or bagged packaging configurations, with 500 tubes per case, and are rated to withstand centrifugal forces up to 15,000 &times; g.
Globe Scientific 15 mL polystyrene tubes with red caps provide enhanced optical clarity for visual sample inspection and are available in sterile and non-sterile versions. They are supplied with attached or separate caps, offered in racked or bagged formats, and rated up to 12,000 &times; g.
Globe Scientific 50 mL polypropylene tubes with flat-top blue caps are designed for larger-volume centrifugation workflows. Available in sterile and non-sterile configurations with attached or separate caps, these tubes are supplied in racked or bagged packaging and can withstand centrifugal forces up to 15,000 &times; g.
Globe Scientific 50 mL polystyrene tubes with red caps combine large-volume capacity with excellent transparency for easy sample visualization. They are available in sterile and non-sterile formats, supplied with attached or separate caps, packaged either racked or bagged, and rated up to 12,000 &times; g.
Nest Scientific 15 mL polypropylene tubes are supplied sterile with attached caps and packaged in polystyrene racks containing 500 tubes per case. These tubes are rated to 12,000 &times; g and are commonly used in cell culture, clinical, and molecular biology applications.
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<h2 data-section-id="1jl751w" data-start="3950" data-end="3975">Specifications Context</h2>
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Globe Scientific 15 mL and 50 mL centrifuge tubes are molded from USP Class VI virgin polypropylene or polystyrene, certified RNase-free, DNase-free, and non-pyrogenic by lot. The 15 mL PP tube is rated to 15,000 &times; g; 50 mL PP tubes to 15,000 &times; g in a supported rotor. Graduated markings on 15 mL tubes read every 1 mL (with sub-milliliter graduations below 1 mL); 50 mL tubes every 5 mL. Globe Scientific is ISO 9001:2015 certified. As of 2026, MBP stocks flat-top (blue cap) and plug-seal (red cap) variants in PP and PS, with sterile and non-sterile options available.
Ensure your high-speed separations remain consistent and safe by choosing tubes built for extreme RCF ratings. <a href="https://mbpinc.net/contact-us" style="color: #236fa1; text-decoration: underline;">Contact the Molecular Biology Products Inc. team</a> for a quote.

15ml & 50ml Centrifuge Tubes

50ml Mini Reactor Tubes 

788211 by NEST Scientific is a 50 mL mini bio-reactor tube for small-scale suspension cell culture and bioreactor seeding. The 0.22 µm vented cap enables sterile gas exchange on a tube shaker; the conical PP/HDPE construction fits standard 50 mL centrifuge rotors. RNase/DNase-free, sterile, 10/pk, 100/cs.

5L High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap

NEST Scientific 5 L Bi-Directional Transfer Cap is a sterile bi-directional transfer cap for 5 L High Efficiency Erlenmeyer Flasks — 90 cm TPE tube (1/8″ ID × 1/4″ OD), 0.22 μm vent filter (Φ24 mm), supports both media addition and culture drain through a single closed-system connection. Sold without flask. 1/pk, 4/cs. Available in TPE small bore, TPE large bore, Silicone Male CPC, and Silicone Female CPC configurations.

5L High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with TPE Tube (90cm 1/8" ID 1/4" OD), Vent Filter (0.22 μm Φ24mm), without Flask, Sterile, 1/pk, 4/cs

5L High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with TPE Tube (50cm 1/4" ID 3/8" OD), Vent Filter (0.22 μm Φ24mm), without Flask, Sterile, 1/pk, 4/cs

5L High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with Silicon Tube (90cm1/4" ID 3/8" OD), Male CPC Connector with Female Sealing Cap with, Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

5L High Efficiency Erlenmeyer Flask Bi-directional Transfer Cap with Silicon Tube (90cm1/4" ID 3/8" OD), Female CPC Connector with Male Sealing Cap with, Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

5L High Efficiency Erlenmeyer Flask Inverted Transfer Cap

The 5L High Efficiency Erlenmeyer Flask Inverted Transfer Cap by NEST Scientific enables closed-system liquid transfer, minimizing external contamination risk during media handling and bioprocess operations. Features a 90 cm transfer tube, 0.22 µm vent filter, and ships sterile to SAL 10⁻⁶. Packed 1 per pack, 4 per case. Available with 1/8" ID (C10431-AZC090B) or 1/4" ID (C10433-DZC090B) tube.

5L High Efficiency Erlenmeyer Flask Inverted Transfer Cap with TPE Tube (90cm 1/8" ID 1/4" OD), Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs

5L High Efficiency Erlenmeyer Flask Inverted Transfer Cap with TPE Tube ( 90cm 1/4" ID 7/16" OD), Vent Filter (0.22 μm Φ42mm), without Flask, Sterile, 1/pk, 4/cs