Beaker (Stackable)

Quick Answer: A stackable plastic beaker is a polypropylene beaker with tapered walls, so empty beakers nest one inside another for compact storage. It is used for mixing, dispensing and rough measuring where many beakers must fit into limited cupboard or kit space.

How the Tapered Design Saves Space

This beaker widens steadily from a narrow base to a wider rim. When empty, one sits down inside the next, so a stack takes far less shelf space than the same beakers standing apart. Beakers with near-vertical walls, such as the regular PP beaker, each need their own shelf position.

The saving counts in classrooms, mobile science kits and field boxes, where dozens of beakers are handed out and collected every lesson. Polypropylene adds a second benefit: nested beakers do not chip or crack against one another the way glass does.

The taper has consequences. With a base narrower than the rim, a full beaker is a little less stable than a straight-walled one, and the volume marks sit closer together near the top. Keep the liquid well below the rim and place filled beakers away from bench edges.

Applications

• Class sets handed out per group for mixing solutions or collecting samples, then nested back into one tray
• Science kits and outreach boxes where space and weight are limited
• Field trips: carry the beakers stacked and empty, then use them individually for water or soil samples
• Practical examinations where many candidates each need an identical beaker of reagent

Specifications

Care & Handling

• Rinse a stackable plastic beaker soon after use, because residue left inside is pressed against the next beaker when the stack is rebuilt.
• Stack only beakers of the same size; forcing a mixed stack distorts the rims.
• Inspect rims after drops; a split rim catches inside the stack and can tear further.
• Mark group numbers on the outside wall with a permanent marker, never on the inside.
• Avoid flames, hot plates, strong oxidisers and aromatic solvents, all of which damage polypropylene.

Why Choose LabEquip

Schools, kit assemblers and outreach teams that move equipment between rooms tend to choose nesting beakers. LabEquip lists them in the Lab Glassware section, and a plastic draining rack makes drying them before stacking easier; ask for quantities via the contact page.

Frequently Asked Questions

Why are stackable beakers tapered?

The taper lets each empty beaker slide part-way inside the next, so a stack takes far less room than the same number of straight-sided beakers. Apart from the shape, the material and everyday uses match a standard polypropylene beaker.

How do I stop nested beakers from sticking together?

Stack them clean and dry, and do not press them down hard. If two beakers lock, twist rather than pull, or run warm water over the outer one so it expands slightly and releases the inner beaker.

Are the graduations on a tapered beaker reliable?

They are approximate, like those on any beaker. Because the wall widens upward, each step in volume takes less height near the rim, so read at eye level and switch to a measuring cylinder when a defined volume matters.

Can I autoclave the beakers while they are stacked?

No. Autoclave them separately, upright and spaced apart, so steam reaches every surface. A nested stack traps air and moisture and may deform as the plastic softens. Check the item’s autoclave rating before sterilising.

Are stackable beakers stable when full?

They stand well on a flat bench but tip more easily than straight-sided beakers, because the base is narrower than the rim. Avoid filling to the brim, keep them back from bench edges, and do not run fast magnetic stirring in them.

What is the easiest way to dry them before stacking?

Stand them upside down on a draining rack or clean paper towel until no water remains inside. A warm-air drying cabinet also works if it is set to a low temperature suitable for polypropylene.

Last Updated: September 2026