Aspirator Bottles, Screw Cap with Tubulation

Quick Answer: The Aspirator Bottles, Screw Cap with Tubulation are reservoir bottles closed by a screw cap at the top and fitted with a tubulation, a short side-tube, near the base. An aspirator bottle with tubulation takes rubber or silicone tubing, or a tap fitted through a bung, so liquid can be run off from the bottom.

Tubulation and Screw Cap Explained

A tubulation is the short tubular outlet formed in the lower wall of the bottle. It is the simplest outlet design: a length of flexible tubing slides over it and is closed with a pinch clip or roller clamp, or a stopper carrying a tap is pushed into it. Tubing makes it easy to lead liquid to a point away from the bottle, such as a sink, a chromatography column or a row of culture vessels.

The screw cap closes the top more securely than a loose stopper. It keeps dust and airborne microbes out of stored distilled water, cuts evaporation and lets the bottle be carried without spilling. When dispensing, open the cap a little or use a vented cap, because a fully sealed bottle builds up a partial vacuum and the outflow slows to a stop.

Whether a cap liner, a tap or tubing are supplied is not stated in the listing, and nor are capacity or glass type. For a ground-glass outlet that takes a stopcock directly, compare the aspirator bottle with socket outlet.

Specifications

Applications

• Distilled or deionised water reservoirs on staining and washing benches
• Feeding buffer or eluent to chromatography and electrophoresis set-ups through tubing
• Dispensing prepared media or solutions into a series of tubes or flasks
• Supplying rinse water to a sink-side wash station for glassware

Using the Tubulation Safely

• Use tubing of the right bore so it grips the tubulation firmly, and secure it with a hose clip if the bottle is tall.
• Replace perished or cracked rubber tubing, which can split and empty the aspirator bottle with tubulation onto the bench.
• Never lever tubing off the tubulation sideways; soften it in warm water or cut it free, because the glass outlet can snap.
• Clean the bottle and tubing together, and run clean water through the outlet before storing it.

Why Choose LabEquip

Microbiology, biochemistry and school biology labs use screw-cap aspirator bottles where stored water or buffer must stay clean for days at a time. LabEquip lists them in Biology Lab Products; tell us the capacity and whether you need a tap or tubing through the contact page.

Frequently Asked Questions

What is a tubulation on an aspirator bottle?

It is a short side-tube near the base of the bottle. Flexible tubing or a stopper carrying a tap is fitted to it so liquid can be drawn off from the bottom.

Why use a screw cap rather than a stopper?

A screw cap seals more securely, keeps out dust and airborne microbes, reduces evaporation and lets the full bottle be moved with less risk of spills.

How do I control the flow from the tubulation?

Fit tubing and close it with a pinch clip or roller clamp, or fit a stoppered tap. Opening the cap slightly lets air in so the flow stays steady.

How do I remove tight tubing without breaking the outlet?

Warm the tubing in hot water to soften it and ease it off with a twisting motion, or cut it lengthwise with a blade. Never pull it sideways, which can snap a glass tubulation.

Can the bottle hold water or media for culture work?

It can serve as a reservoir for sterile water or media if the bottle, cap and tubing are sterilised together, where their ratings allow, and the outlet is kept closed and covered between uses.

Which capacities are available?

Screw-cap aspirator bottles are made in several sizes, from bench-top to floor-standing. The listing does not give the capacity, so confirm the size you need when you enquire.

Last Updated: September 2026