1PC Wine futuristic Cosy Whiskey Stones Glacier Ice Cube Bulk Drinking Bar Home Only 1 piece Glacier rocks are a great way to cool your favorite drinks. Unlike ice cubes, they gently cool your drink without diluting them. Made from "soft" stone, these rocks won't scratch glassware. They are also inert so they won't affect the flavor of any drink. Suggested freeze 2 hours before use .