Wide Mouth Square Bottle, Plastic

Quick Answer: The Wide Mouth Square Bottle, Plastic is a screw-capped plastic storage bottle with a square body and a broad opening, used for powders, granules, solid reagents and samples that have to be spooned or scooped in and out.

Square Body, Wide Opening: What Each Feature Does

The two features of this bottle solve two different problems. The wide mouth lets a spatula, scoop or powder funnel in easily and lets a brush reach every corner during cleaning, which is why this style is used for solid chemicals, dehydrated media, soil and food samples. The square body is about storage: square bottles sit edge to edge on a shelf or in a carton with no gaps between them, offer a flat face for labels, and do not roll if knocked over.

Compared with a narrow mouth bottle, the trade-off is pouring control. Liquids pour less neatly from a broad opening and the larger cap has a longer seal line to keep tight, so the narrow neck remains the more practical choice for liquid reagents that are poured every day. For specimens that are examined whole in liquid, a rectangular jar gives even wider access.

Square laboratory bottles are usually moulded in HDPE or PP. Both are tough and generally resist acids, alkalis and salts at room temperature, and PP is generally the one that tolerates autoclaving, which matters if the wide mouth square bottle will hold media or samples that must be sterilised.

Specifications

Applications

• Repacking solid chemicals from bulk drums into smaller bench containers.
• Holding opened dehydrated culture media powder with the cap tightly closed.
• Collecting soil, sediment or food samples for analysis.
• Storing silica gel or other desiccant between regeneration cycles.

Care & Handling

• Wipe the rim and threads before closing so trapped powder does not stop the cap sealing.
• Label the flat face with the substance, grade and date opened.
• Dry the bottle completely after washing before refilling it with a powder, since moisture makes many powders cake.
• Use a clean, dry spatula each time so moisture and traces of other chemicals are not carried into the powder.

Why Choose LabEquip

Prep-room technicians, food and soil testing labs and microbiology departments buy square wide mouth bottles to organise solids and samples on limited shelf space. For liquids, pair them with the narrow mouth plastic bottle; for larger specimens, the rectangular plastic jar is the closer match. The complete Lab Glassware range is online, and LabEquip can quote for mixed sizes.

Frequently Asked Questions

Why choose a square bottle over a round one?

Square bottles fit together edge to edge, so more of them fit on a shelf or in a storage box, and their flat sides make labels easier to apply and read. They are also less likely to roll away if they fall over.

Is a wide mouth bottle suitable for liquids?

It can hold liquids, but pouring is less controlled than from a narrow neck and the wider cap has more seal area to keep tight. For liquids that are poured frequently, a narrow mouth bottle is usually the more practical choice.

How do I stop powder from jamming the cap?

Wipe the rim and threads with a dry cloth before closing the bottle. Powder trapped in the threads prevents a tight seal and makes the cap hard to open, and hygroscopic powders can cake there if moisture gets in.

Can the bottle hold hygroscopic chemicals?

Yes, if the cap is closed promptly after each use. Plastic is not a perfect moisture barrier, so for strongly hygroscopic substances keep the closed bottle inside a desiccator or a sealed cabinet.

Can a plastic square bottle be autoclaved?

Only if it is polypropylene. PP bottles are generally autoclavable, while HDPE softens at autoclave temperatures. Check this bottle’s rating before autoclaving, and keep the cap loose so pressure can equalise.

Is it suitable for soil and food samples?

Yes. The wide opening makes it easy to fill with a scoop and to empty completely, and the flat faces take a sample label. Clean and dry bottles thoroughly between samples to avoid carry-over, or use new bottles for trace analysis.

Last Updated: September 2026