Demijohns, often referred to as carboys or glass jugs, are iconic vessels used for the storage and fermentation of liquids, particularly in the realms of winemaking, brewing, and home fermentation. These 5 litre containers are made of glass, and their distinctive shape, with a narrow neck and a round body, has made them a classic and functional choice for various liquid-related processes. Optional accessories include airlocks, rubber bungs, yellow support baskets and syphon tubing.