ALWSCI Lab Gas Washing Bottle Glass 250mL Graduated - Durable

In this review of the ALWSCI Lab Gas Washing Bottle Glass 250mL, the bottom line is straightforward: this is a utility-focused gas scrubber and buffer bottle for laboratories that need a durable, autoclavable container with clear graduations. The reviewer found it best suited for chemical labs, distillation setups, and vacuum systems where glass purity and wall strength matter. The single biggest reason to buy is the high-purity borosilicate construction with a thick, uniform wall that tolerates extreme temperature ranges while remaining reusable and easy to label.

Key Features

• Superior glass material: High-purity borosilicate glass offers low thermal expansion and excellent clarity for visual monitoring of contents.
• Wide temperature resistance: Bottle use from -198C to +500C means it withstands extreme laboratory heating and cooling cycles without deforming.
• Thick, uniform walls: A 3.8mm wall thickness and tight tolerance improve durability and reduce the chance of thermal stress failure.
• Multifunctional design: Works as a screw-top gas scrubber to remove gas impurities and as a buffer bottle to protect vacuum pumps during distillation.
• Autoclavable and reusable: The reagent bottle and components are designed for repeated sterilization and long-term reuse, reducing waste.
• Graduated scale: Clear, easy-to-read graduation marks make estimating volume straightforward during routine use.

Who It's For

The ALWSCI 250mL gas washing bottle is aimed at research and teaching labs that require reliable glassware for gas scrubbing, distillation buffering, or reagent storage where thermal resilience is needed. It is especially valuable for teams that regularly autoclave glass and need a glass body that tolerates repeated high temperatures.

Less suitable users include those who require plastic-only bottles for certain chemical compatibilities or single-use disposables, and labs that need very large volumes since this model is a compact 250mL capacity. For basic squeeze-wash bottle tasks, a simpler wash bottle may be more economical.

Pros & Cons

Pros

• High-purity borosilicate glass provides excellent chemical resistance and clarity.
• Wide operating temperature range supports autoclaving and extreme thermal cycles.
• Robust 3.8mm wall thickness increases durability and reduces permeability concerns.
• Graduated markings and reusable components simplify routine lab workflows.

Cons

• At 250mL, capacity is limited for larger-scale processes or high-throughput buffering.
• Screw cap components are PP/PBT which have lower maximum temperature limits than the glass.

Specifications

Capacity	250mL
Material	Borosilicate glass (3.3 tubing)
Wall thickness	3.8mm (0.1mm)
Temperature range	-198C to +500C (glass); cap up to +140C
Top thread	GL45 Drechsel head with filter disc
Cap	GL14 PBT red screw cap with pouring ring

Our Verdict

The ALWSCI 250mL Lab Gas Washing Bottle is a solid choice for labs that need a compact, heat-tolerant gas scrubber or buffer bottle with superior glass quality and thick walls. It delivers good long-term value where durability and autoclavability are priorities, though labs needing larger capacity or fully high-temperature caps should verify compatibility before purchase.

Frequently Asked Questions

Is the bottle safe for autoclaving?
Yes, the borosilicate glass body is autoclavable and rated from -198C to +500C; the screw cap pouring ring is rated up to +140C.

Can it be used as a gas scrubber and buffer bottle?
Yes, the design functions as a laboratory screw-top gas scrubber and can act as a buffer bottle to extend vacuum pump life during distillation.

Are the graduation marks accurate for dosing?
The bottle has an easy-to-read graduated scale suitable for estimating contents; wall uniformity and tight tolerances improve measurement consistency.