Old Potrero Single Malt Straight Rye WhiskeyAged 6yrs 97 Proof 48. 5% ABV 700ml This straight rye whiskey was aged in new handmade fine grain charred American oak barrels. In traditional barrel making, the cooper heats the staves over a fire of oak chips, allowing them to be bent and formed into a barrel. During this process, the inside of the barrel becomes lightly toasted. By the early 19th century, coopers had learned that if they allowed the heat to continue, the inside of the barrel would