A full-size keg, also known as a half-barrel keg, is a common container used for storing and dispensing beer. It typically holds 15.5 gallons, which is equivalent to about 165 12-ounce servings. Full-size kegs are often used in bars, restaurants, and for large gatherings or events. These kegs are made of stainless steel and are designed to maintain the freshness and carbonation of the beer inside. They come with a standard D-system coupler for easy tapping and are widely recognized in the brewing industry. Full-size kegs are a popular choice for breweries and beer enthusiasts alike.