The first WhistlePig Whiskey aged in Vermont Estate Oak. In partnership with ISC, Master Distiller Dave Pickerell designed a custom char and toast for our unique VT Estate Casks, made from oak trees harvested right from our farm and the surrounding area. Vermont oak has tighter grains, or more growth rings per inch. Each ring is an opportunity to impart more flavor and depth in the whiskey. At 15 years old, this is some of the oldest Rye Whiskey in the world.