Carboy

A carboy, also known as a demijohn or a lady jeanne, is a rigid container with a typical capacity of 4 to 60 litres (1 to 16 US gal).

[7] Demijohn originally referred to any glass vessel with a large body and small neck, enclosed in wickerwork.

In brewing, a carboy or demijohn is a glass or plastic vessel used in fermenting beverages such as wine, mead, cider, perry, and beer.

In modern laboratories, carboys are usually made of plastic, though traditionally were (and still are in many university settings) made of ferric glass or other shatter-resistant glasses immune to acid corrosion or halide staining common in older plastic formulations.

Polypropylene carboys are also commonly used in laboratories to transfer purified water.