Whistle Pig 18 Year Single Barrel Rye Whiskey - Hand bottled on the WhistlePig Farm, in commemoration of the WhistlePig rye harvest and inaugural Vermont floor malting, this 18-year-old WhistlePig is distilled from 79% rye, 15% malted rye, and 6% malted barley. Rich and savory, and full of spice. Its complexity is only heightened after 18 years in the barrel.