A sixth-barrel keg, also known as a sixtel, is a type of beer keg that holds approximately 5.16 gallons or 19.5 liters of liquid. This size is smaller than the more common quarter-barrel and half-barrel kegs, making it a popular choice for smaller gatherings or craft breweries that want to offer a variety of beers without taking up too much space. These kegs are often used in bars, restaurants, and at home for parties, allowing for easy handling and storage. The sixth-barrel keg is compatible with standard keg couplers, making it convenient for serving draft beer.