Great for small events. Each barrel will hold 1.5 gallons and will freeze in roughly an hour. The two barrels also give you the option of serving two tasty flavors to your guests! The machine is best used indoors or in a cool area. Please note that the price on certain peak dates (including but not limited to: Mardi Gras/Balls, Cinco de Mayo, Memorial Day, July 4, Labor Day, Halloween and other dates designated by management will be a minimum 2x the regular rental rate.