WhistlePig rye whiskey partnered with Liquid Death on a new whiskey aged in casket-shaped barrels. GraveStock is a wheat whiskey partially aged in an actual casket and made with Liquid Death's mountain-sourced water. The limited-release takes aim at the spritz, canned cocktail, and beer business, featuring a lively, 86-proof spirit that has notes of honeysuckle, biscotti, and butterscotch. WhistlePig Gravestock Wheat Whiskey costs $74.99 for a 750ml bottle and will be sold beginning June 24 online and at select retailers, restaurants, and bars.