A half-barrel is a common term used in brewing and beverage industries, referring to a container that holds approximately 15.5 gallons (58.67 liters) of liquid. This size is often used for storing and transporting beer, making it a popular choice among breweries and bars. The half-barrel is also known as a "full-size keg" in the United States. In addition to beer, half-barrels can be used for other beverages, such as cider and wine. They are typically made of stainless steel or aluminum, which helps preserve the quality of the liquid inside. The half-barrel is an essential component in the brewing process and is widely recognized in the hospitality industry.