A beer barrel is a container traditionally used for storing and aging beer. Made from wood, typically oak, these barrels can hold various volumes, with the most common size being the standard 31-gallon U.S. beer barrel. The wood imparts unique flavors to the beer, enhancing its taste and aroma during the aging process. In addition to storage, beer barrels are often used for serving beer in pubs and breweries. They can be tapped to dispense beer directly, making them a popular choice for events and festivals. The craftsmanship involved in making a beer barrel is significant, with skilled artisans known as coopers specializing in this trade.