glass carboy

A glass carboy is a large, cylindrical container made of durable glass, typically used for fermenting or storing liquids such as wine, beer, or other beverages. It has a narrow neck to facilitate filling, pouring, and minimizing contamination, often fitted with a rubber or plastic stopper that allows gases to escape during fermentation. Its sturdy construction makes it reusable and easy to clean. Carboys are favored in homebrewing and small-scale production for their ability to safely contain fermenting liquids while allowing visual monitoring of the process.