Food Grade Stainless Steel: The metal ice cubes are made of 304 food grade stainless steel, safe and healthy, durable, easy to clean and reusable. Rinse well with water before use. Wine Cooling Tool: This ice cube will not dilute your drink or affect the taste of your drink. Widely used in whiskey, liquor, red wine, coffee and even various beverages. [How to use]: Please put the whiskey stones in the refrigerator for more than 4 hours before use, and do not put them in a cool room. Add the right amount of ice cubes according to the volume of the wine. Perfect Gift: ice wine stone set for birthday, Valentine's Day, Father's Day, Mother's Day, Thanksgiving, Halloween, Christmas, New Year, etc. Can be used for home, office and parties. WIDE USE: Stainless steel ice cubes can be used to cool various drinks, or put in ice packs to reduce fever, and can also be used for sports sprains, cold compresses can help reduce swelling.