The Handy House Sipping Pure Soap Stones with Muslin Bag (Set of 9), Gray Use these Whiskey Rocks to put the chill on your favorite whiskey or spirit; Chills with no dilution of flavor Freeze them in the included muslin bag then put 2-3 per glass to cool your drink When done, simply rinse, air dry and store again in the freezer; Not for use by children Set of nine 100% pure soap stones; Made of talc and are non-porous and non reactive A perfect wedding groomsman gift or housewarming idea