Wash Bottle (New Type), Plastic

Quick Answer: A new type plastic wash bottle is a squeezable rinse bottle with a delivery tube and jet, sold under the name “new type” alongside LabEquip’s standard plastic wash bottle. It directs a fine, controllable stream of distilled water or solvent for rinsing glassware and precipitates.

What “New Type” Means for a Wash Bottle

The title separates this bottle from the standard plastic wash bottle but does not say how. In plastic labware ranges the name is usually given to a revised design, commonly one in which the cap and delivery tube form a single moulded unit, or in which the neck is wider for easier filling. A one-piece cap and jet has fewer joints to leak and no loose tube to pull out during cleaning. Ask which features the supplied bottle has before choosing between the two listings.

The listing image filename mentions a 500 ml bottle, but the title gives no capacity. Whatever the design, the bottle works the same way: squeezing the flexible body, usually low-density polyethylene, raises the pressure inside and pushes liquid up the tube and out of a fine jet. Releasing the squeeze draws air back in through the jet.

Wash bottles are for rinsing, not for measuring. Each carries a single liquid, most often distilled water, and a bottle once used for ethanol or acetone should keep that label for life.

Specifications

Care & Handling

• Keep the jet clean, and never press it into a precipitate or against a filter paper.
• Do not fill with hot liquids; a warmed polyethylene body softens and the stream becomes hard to control.
• Mark the contents on the bottle, and never refill a solvent bottle with water.

Applications

• Rinsing the last particles of precipitate from a beaker onto the filter paper in gravimetric work
• Washing down the sides of a titration flask near the end point
• The final distilled-water rinse of pipettes, burettes and volumetric flasks
• Topping up a volumetric flask to just below the mark before finishing with a dropper

Why Choose LabEquip

Lab staff who want a wash bottle that is simple to fill and less prone to leaks look for newer designs like this one. It sits in LabEquip’s chemistry lab equipment range; ask us about its cap and jet design through the contact page.

Frequently Asked Questions

How does the new type wash bottle differ from the standard one?

The listing does not specify. In most plastic labware ranges the newer design has a one-piece moulded cap and delivery tube, or a wider neck, which reduces leaks and makes filling easier. Confirm the exact features with us before ordering.

Why does my wash bottle drip after I stop squeezing?

Liquid left in the tube drains out, and warmth from a hand or a sunny bench expands the air inside, pushing out a little more. Store the bottle upright, away from heat, and loosen the cap slightly if dripping persists.

Can the wash bottle hold acetone or ethanol?

Polyethylene wash bottles are widely used for ethanol, methanol and acetone, but keep a separate, clearly labelled bottle for each solvent. Chlorinated solvents can soften polyethylene and should be avoided.

How do I refill it without spilling?

Unscrew the closure, stand the bottle on the bench and fill it through a small funnel or directly from a carboy tap. A wider neck, if this design has one, makes the job easier.

Is the wash bottle autoclavable?

Low-density polyethylene bottles are generally not autoclavable, because the material softens below autoclave temperature. For sterile rinsing, prepare sterile water separately and use a bottle designed for sterilisation.

Can I use a wash bottle to measure liquid?

No. Any marks on a wash bottle are only approximate. Use it to rinse and to bring liquids close to a mark, then measure with proper volumetric apparatus.

Last Updated: September 2026