Name: Cell Culture Flask, Vent Cap, Non-Treated, Sterile - Nest Scientific
SKU: 707013
Availability: InStock

Cell Culture Flasks

<h2 dir="ltr">What are Cell Culture Flasks?</h2>
 Cell culture flasks (T-flasks) are sterile, rectangular polystyrene vessels with a canted, angled neck designed to house adherent or suspension cell cultures in a CO₂ incubator. They are available in growth surface areas from T25 (25 cm&sup2;) to T225 (225 cm&sup2;), with either tissue culture&ndash;treated (TC-treated) surfaces for adherent cells or non-treated surfaces for suspension and microbial culture. Cap options include vented caps with 0.2 &micro;m hydrophobic membranes for CO₂ gas exchange, and plug seal caps for anaerobic or sealed transport.&nbsp; Choose the flask size based on the number of cells needed for downstream applications: T25 for seed stocks, T75 for routine maintenance, T175 and T225 for scale-up and protein production runs.
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<h2 dir="ltr">What you will find:</h2>
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<a href="cell-culture-flasks/treated-cell-culture-flasks" title="Treated Cell Culture Flasks" style="color: #236fa1;">Treated Cell Culture Flasks</a>: Vacuum-plasma modified surfaces that enhance hydrophilic interaction for uniform monolayer formation.
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<a href="cell-culture-flasks/non-treated-cell-culture-flasks" title="Non-Treated Cell Culture Flasks:">Non-Treated Cell Culture Flasks:</a> Naturally hydrophobic polystyrene designed specifically for hybridomas and non-adherent suspension cultures.
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<h2 dir="ltr"> How to Choose Cell Culture Flasks</h2>
 Size by Growth Area and Working Volume T25 flasks (25 cm&sup2;, working volume 5&ndash;10 mL) are used for seed stocks, small-scale experiments, and initial passages of new cell lines where preservation of limited cells is critical. T75 flasks (75 cm&sup2;, 15&ndash;25 mL) are the routine maintenance format for most adherent cell lines in research settings. T175 flasks (175 cm&sup2;, 35&ndash;50 mL) suit scale-up for protein production, viral vector manufacturing, and high-yield transient transfection. T225 flasks (225 cm&sup2;, 50&ndash;70 mL) provide maximum single-flask growth area before scale-up to multi-layer vessels. TC-Treated vs. Non-Treated Surface TC-treated flasks (vacuum plasma treated, contact angle &lt;10&deg;) are essential for adherent mammalian cell lines &mdash; HeLa, HEK293, CHO (adherent), Vero, A549, NIH 3T3, and primary cells, including fibroblasts, epithelial cells, and endothelial cells. Non-treated flasks maintain the original hydrophobic PS surface, preventing adherent growth &mdash; used for suspension CHO, Jurkat, K562, hematopoietic cells, hybridomas, Sf9/Hi5 insect cells, and bacterial culture. Canted vs. Straight Neck A canted (angled) neck on the flask allows the flask to rest at an angle when standing, keeping the growth surface slightly tilted during feeding and pipetting. This angled geometry improves access for serological pipettes and reduces the risk of contaminating the culture surface during media changes. All NEST Scientific T-flasks use a canted neck design. Cap Type and Gas Exchange Vented caps with 0.2 &micro;m hydrophobic membranes are the standard for CO₂ incubator use. The 0.2 &micro;m pore size blocks microbial contamination while allowing CO₂ and O₂ to equilibrate freely, maintaining medium pH through the bicarbonate buffering system. Plug seal caps isolate the flask from the ambient atmosphere &mdash; used for short-term transport, sealed storage, and anaerobic culture applications. Some protocols require alternating between vent and plug seal during different culture phases. Sterility and Traceability All NEST Scientific cell culture flasks carry E-beam sterilization (ISO 11137 equivalent SAL 10⁻⁶), DNase/RNase-free and pyrogen-free lot certification, batch traceability codes, and are produced under ISO 9001:2015 and ISO 13485 quality management. Flasks are individually packaged in peelable Tyvek sleeves or resealable sterile bags. Each flask features two large labeling areas for cell line identification and passage number notation.
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<h2 dir="ltr">Compare Cell Culture Flask Sizes </h2>
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<li>T25: Growth Area: 25 cm&sup2;; Working Volume: 5&ndash;10 mL; Typical Cell Yield (adherent): 5&ndash;8 &times; 10⁶; Best Application: Seed stock, new cell line setup.</li>
<li>T75: Growth Area: 75 cm&sup2;; Working Volume: 15&ndash;25 mL; Typical Cell Yield (adherent): 15&ndash;25 &times; 10⁶; Best Application: Routine passage and maintenance.</li>
<li>T175: Growth Area: 175 cm&sup2;; Working Volume: 35&ndash;50 mL; Typical Cell Yield (adherent): 35&ndash;60 &times; 10⁶; Best Application: Scale-up, transient transfection.</li>
<li>T225: Growth Area: 225 cm&sup2;; Working Volume: 50&ndash;70 mL; Typical Cell Yield (adherent): 50&ndash;80 &times; 10⁶; Best Application: High-yield expansion, virus production.</li>
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<h2 dir="ltr"> Specifications Context</h2>
 NEST Scientific cell culture flasks (T25 catalog 707001, T75 catalog 708001, T175 catalog 709001, T225 catalog 710001) are manufactured from 100% virgin polystyrene in an ISO 8 (Class 10,000) cleanroom. Vacuum plasma TC treatment creates a surface contact angle of &lt;10&deg; (hydrophilic) per NEST lot data, verified by water contact angle goniometry. Vented caps contain a hydrophobic 0.2 &micro;m PTFE membrane that passes the USP Particulate Standard for injectable preparations &mdash; confirmed free of fibers and particulates at lot release. Flask footprints are standard for incubator shelf spacing: T25 width 100 mm, T75 width 150 mm, T175/T225 width 167 mm. As of 2026, NEST Scientific flasks are stocked by MBP for same-case reorder by PO. MBP is a registered vendor for Howard Hughes Medical Institute, Vanderbilt University, and MD Anderson Cancer Center. 
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Eliminate variables in the incubator to ensure absolute integrity in your results with MBP's Cell Culture Flasks! <a href="https://mbpinc.net/contact-us">Reach out to our team</a> today for volume-based pricing.

<h2 dir="ltr">What are Non-Treated Cell Culture Flasks?</h2>
 Non-treated cell culture flasks are sterile polystyrene T-flasks that retain the original hydrophobic, unmodified surface of the polystyrene substrate &mdash; no plasma, corona, or chemical surface treatment is applied. The hydrophobic surface minimizes cell attachment, making these flasks the correct vessel for cell types that grow in suspension or require minimal surface contact: suspension-adapted CHO, Jurkat, K562, HL-60, hematopoietic progenitors, hybridomas for monoclonal antibody production, insect cell lines (Sf9, Hi5), yeast, and bacteria. NEST Scientific non-treated flasks are manufactured from 100% virgin polystyrene in ISO 8 cleanrooms, E-beam sterilized to SAL 10⁻⁶, and available in T25, T75, T175, and T225 sizes with vented (0.2 &micro;m PTFE membrane) or plug seal caps. 
Use non-treated flasks exclusively for cell types that do not require surface attachment; placing adherent mammalian cell lines in a non-treated flask causes cell death within 24&ndash;48 hours. 
<h2 dir="ltr">What you will find:</h2>
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Suspension-Optimized Surface, like naturally hydrophobic polystyrene, ensures cells remain in suspension without surface interference.
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Scalable Formats precision-engineered in T25, T75, T175, and T225 sizes to fit various research scales.
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Aseptic Security with certified RNase-, DNase-, and Pyrogen-free to maintain the highest purity standards.
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Ergonomic Access with angled neck design facilitates seamless pipette access and reduces the risk of contamination during media changes.
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<h2 dir="ltr">How to Choose Non-Treated Cell Culture Flasks</h2>
 Application: Suspension Mammalian Cells Suspension-adapted cell lines &mdash; CHO-S, HEK293-F, Expi293, and HEK293-EBNA variants used in transient transfection &mdash; require non-treated flasks for static suspension culture between spinner flask passages or when the scale is too small for orbital shaker flasks. Cells must be agitated (shaken, pipetted, or rocked) periodically to prevent settling when in static non-treated flasks with volumes &gt;5 mL. Application: Hematopoietic and Immune Cells Non-adherent hematopoietic cell lines (Jurkat T-cells, K562 erythroleukemia, HL-60 promyelocytes, Raji B-cells) and primary hematopoietic cells (peripheral blood mononuclear cells (PBMCs), bone marrow progenitors) must be cultured in non-treated vessels. TC-treated surfaces activate integrin signaling in hematopoietic cells, inducing undesired differentiation and stress responses. Application: Hybridoma Culture Hybridoma cells for monoclonal antibody (mAb) production are non-adherent B-cell fusions that grow as suspension cultures. Non-treated T75 and T225 flasks, combined with HT-supplemented DMEM/HAT medium, are the standard vessels for hybridoma selection and expansion. Scale-up from T225 non-treated flasks typically progresses to spinner or hollow-fiber bioreactors. Application: Insect Cells Sf9 (Spodoptera frugiperda) and Hi5 (Trichoplusia ni) insect cells used in baculovirus expression vector systems (BEVS) require non-treated polystyrene for monolayer culture. On TC-treated surfaces, Sf9 cells attach so strongly that they are difficult to recover. Non-treated flasks allow Sf9 to loosely adhere and detach easily with tapping, or to grow as a loosely attached monolayer that tolerates trypsin-free passaging. Application: Microbial Culture Non-treated polystyrene T-flasks with plug seal caps can serve as culture vessels for E. coli, Bacillus subtilis, yeast (S. cerevisiae, P. pastoris), and other microorganisms where the large surface area per volume is needed, and standard Erlenmeyer flask orbital shaking is unavailable. Ventilated caps support aerobic culture; confirm that the vented 0.2 &micro;m membrane is compatible with your aeration requirements. Cap Selection for Non-Treated Flasks Vented caps (0.2 &micro;m PTFE membrane) are standard for suspension cultures in a CO₂ incubator. For microbial aerobic culture without a CO₂ incubator, vented caps with 0.2 &micro;m pore still provide adequate aeration. Plug seal caps are used for anaerobic culture, transport, and short-term storage.
<h2> Specifications Context</h2>
 NEST Scientific non-treated cell culture flasks are manufactured from 100% virgin polystyrene with no surface modification. Contact angle of non-treated PS surface is approximately 75&ndash;90&deg; (hydrophobic), confirmed by water contact angle measurement per NEST lot QC data. E-beam sterilized in ISO 8 cleanrooms to SAL 10⁻⁶; DNase-free, RNase-free, and non-pyrogenic per lot certificate. Vented caps use a 0.2 &micro;m hydrophobic PTFE membrane. As of 2026, NEST Scientific non-treated flasks are stocked by MBP in all four sizes (T25, T75, T175, T225) with vented and plug seal options, in case quantities for PO-based institutional ordering. MBP is a registered vendor for Howard Hughes Medical Institute, Vanderbilt University, and MD Anderson Cancer Center. 
Elevate your suspension culture workflows. <a href="https://mbpinc.net/contact-us">Contact Molecular Biology Products Inc.</a> for your Non-Treated Cell Culture Flasks today!

Non-Treated Cell Culture Flasks

DataSheet

Product Literature

Cell Culture Flask, Vent Cap, Non-Treated Specifications

Cell Culture Flask, Vent Cap, Non-Treated, Sterile - Nest Scientific

Cell Culture Flasks, Vent Cap, Non-Treated by NEST Scientific — 25 cm² T-25 cell culture flask with vent cap and non-treated surface. 50 mL total volume, sterile, 10/pk. Designed for suspension cells, hybridoma culture, and applications where surface adhesion must be prevented. Available in four sizes: 707013 (25cm²), 708013 (75cm²), 709013 (175cm²), 721013 (225cm²).