Food Grade & SafeOur ice cube / whiskey stones, made from food grade stainless steel, water and some other food grade elements inside, give no added taste or smell to your Ice, gives cold drinks fast, which is needed for high quality life.Cool Drinks Longer Just place these ice cubes in the freezer 2 -3 hours in advance, then put 3-4 cubes into your Bourbon, Wine, Gin and Scotch beverage, start a cool drink.Smooth Surface - Easy Use and CleaningSmooth for Quick and easy: 2 hours freezing time; 2 minutes to get your drinks ready; 3 steps: freeze them, use them, dish-wash-them.Can be HeatHeat the reusable Ice Cubes, and toss them in your cold milk or tea to warm it.Package Includes4*Ice Cubes, 1*Ice Cube Tray, 1*Tongs