Cornelius keg

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A Cornelius keg (also known as a Corny keg or soda keg) is a stainless steel canister (keg) originally used as containers by the soft drink industry.^[1] They can be used to store and dispense carbonated or nitrogenated liquids. Cornelius kegs were originally made by Cornelius, Inc.

In the keg, fully made soda is stored under pressure just like standard cans and bottles. The soda is referred to as "premix" in the industry, as compared to "postmix" bag-in-box (BiB) packages which are concentrated syrup. BiB soda is cheaper but requires a high-quality water source and well-calibrated dispenser. Premix soda costs more and takes up more space, but can be used anywhere, and the equipment is simpler and cheaper.

Once the main method of delivering and dispensing soda, today kegs are largely obsolete in the soda industry. Cornelius kegs are now widely used for homebrewed beer and other homemade beverages such as soda or nitro cold brew coffee.