Name: Wash Bottles, Unitary, Colored Caps, 500 mL, 4 Pack
Brand: United Scientific
SKU: WBSET4
Price: 21.85 USD
Availability: InStock

<h2 data-section-id="gy6c1g" data-start="0" data-end="42">What Are Laboratory Wash Mouth Bottles?</h2>
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Laboratory wash bottles, also known as squeeze bottles or wash mouth bottles, are flexible LDPE containers available in 250 mL, 500 mL, and 1000 mL capacities. They feature a narrow dispensing nozzle or integrated draw-tube spout that delivers a controlled stream of liquid when the bottle is squeezed by hand. The flexibility of LDPE enables this dispensing action, making it the preferred material for wash bottles. These bottles are commonly used for rinsing laboratory glassware with distilled or deionized water, dispensing solvents during sample preparation, flushing residues during titrations and extractions, and directing liquids into narrow-neck vessels. Globe Scientific wash bottles are available with color-coded polypropylene caps and GHS-labeled safety-vented options for handling volatile solvents. Safety-vented wash bottles should always be used with volatile solvents such as ethanol, methanol, isopropanol, and acetone to prevent pressure build-up caused by vapor expansion.
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<h2 dir="ltr">What you will find: </h2>
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Laboratory wash mouth squeeze bottles for controlled rinsing
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Chemical-resistant LDPE wash bottles for routine lab use
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Narrow-tip dispensing bottles for precise liquid flow
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Distilled water wash bottles for cleaning applications
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Buffer solution dispensing bottles for lab workflows
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Reagent-grade wash bottles for general handling tasks
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Durable plastic squeeze bottles for daily laboratory use
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Flexible wash bottles designed for repeated bench operations
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General-purpose rinse bottles for multi-use lab environments
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<h2 data-section-id="zngmf6" data-start="1041" data-end="1076">How to Choose Wash Mouth Bottles</h2>
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Vented vs. Non-Vented
Non-vented wash bottles are suitable for deionized water, distilled water, and other non-volatile aqueous solutions. Safety-vented wash bottles include a pressure-relief vent in the dispensing nozzle, allowing solvent vapors to escape safely and reducing the risk of pressure accumulation. These bottles are recommended for volatile solvents such as ethanol, methanol, isopropanol, and acetone. Globe Scientific GHS-labeled wash bottles combine safety venting with pre-printed hazard labeling for improved chemical identification and compliance.
Color-Coded Cap System
Color-coded caps help prevent reagent mix-ups in busy laboratory environments. A commonly used convention is blue for water, red for ethanol, yellow for isopropanol, green for methanol, and white for custom labeling or general use. Establishing a consistent color-coding system throughout the laboratory helps improve safety and workflow efficiency.
Wide Mouth vs. Standard Design
Standard wash bottles use a narrow draw tube extending to the base of the bottle, allowing liquid dispensing while the bottle remains upright. Wide-mouth wash bottles feature a larger neck opening, making refilling from bulk containers, carboys, or reagent bottles faster and easier. Laboratories that refill bottles frequently often prefer wide-mouth designs to reduce spills and simplify handling.
Volume Selection
The 500 mL wash bottle is the most common laboratory size, providing a balance between capacity and ease of handling. A 250 mL bottle is ideal when smaller volumes are sufficient or greater dispensing control is required. For high-throughput environments where liquids are used continuously, 1000 mL bottles minimize refill frequency and improve efficiency.
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<h2 data-section-id="1jl751w" data-start="3495" data-end="3520">Specifications Context</h2>
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Globe Scientific Diamond RealSeal LDPE wash bottles feature an integral-seal polypropylene screw cap and draw-tube assembly for reliable dispensing. Wide-mouth models incorporate a larger neck opening to facilitate rapid refilling while retaining the same dispensing performance. GHS-labeled wash bottles are designed to support compliance with Globally Harmonized System (GHS) chemical hazard communication requirements and are widely used for solvent handling in research, pharmaceutical, industrial, and educational laboratories. As of 2026, safety-vented GHS-labeled wash bottles are considered standard practice in laboratories handling flammable solvents on the bench. Explore wide mouth bottles and narrow mouth bottles for applications requiring long-term liquid storage rather than squeeze dispensing.
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Wash Mouth Bottles

United Scientific

Key Specifications

Wash Bottles, Unitary, Colored Caps, 500 mL, 4 Pack

United Scientific® Wash Bottles, Unitary, Colored Caps by United Scientific is a set of four 500 mL LDPE wash bottles with built-in delivery tubes and polypropylene caps in red, yellow, blue, and white. The translucent, pliable bottles dispense with a light squeeze and carry outer-surface graduations for approximate volumes. Teaching labs and research benches use the set to keep several rinse solutions color-coded at one workstation.