The Balvenie 21 Year Old Single Barrel Traditional Oak Single Malt Scotch Whisky Deep well water They hand select some of 813219020758 They hand select some of the oldest barrels in the warehouse to produce a single barrel bourbon with hints of toffee velvety texture envelops the senses with a luxurious mouthfeel The Balvenie Single Barrel Traditional Oak 21 Year Old is a single malt scotch whisky that has been matured exclusively in a refill American oak cask for at least 21 years He will only select single malt characterized by the subtle spices and rich honeyed sweetness he expects from maturation in this type of cask to be bottled as The Balvenie Single Barrel Traditional Oak