Jack Daniel's Single BarrelJack Daniels Single Barrel Tennessee Whiskey, the worlds first charcoal mellowed single barrel Tennessee Whiskey, allows whiskey aficionados to sample the work of individual barrels, comparing the subtle differences imbued by each barrels unique oak wood and ageing experience. Every barrel of Jack Daniels Single Barrel absorbs its own personality and character from its charred White American Oak barrel and its special location in the warehouse.