Introducing Rabbit Hole Boxergrail Rye. Our 95% Straight Rye Whiskey, Boxergrail, is inspired by one of the greatest boxers, and Louisvillian, of all-time. Bold and unexpected this whiskey echoes his personality while remaining patient and refined with a character befitting a champion. Brown sugar and citrus with bright floral notes, herbaceous, black tea flavors with rich sweetness and spice that gently takes you to the finish.