The offered 30 kg Carbuoy is primarily used for transporting liquids, often water or chemicals. They are also used for in-home fermentation of beverages, often . It is a large globular plastic bottle with a narrow neck, typically protected by a frame and used for holding acids or other corrosive liquids. It is a holding vessel with a volume of 6.5 gallons that can be made of plastic or glass. The 30 kg Carbuoy is very useful and made for efficient purposes.