Whiskey Stones by Wuudi -Stainless Steel Reusable Wine Cooling Cubes with Ice Tongs, Whiskey Chilling Rocks, Whisky Ice Stones and Set of 4-8 (4 pieces) Designed to be reusable, No pollution. Environmentally safe.FDA Certificate and BPA free. The storage box better than pouch for frozen and storage in freezer.To keep them clean and organized.And storage tray keeps your whiskey stones clean and to organize them during freezing. Solid Stainless Steel Material contains natural antibacterial properties. Never rusts or corrodes or wears.Easy to use and clean. It's different from others' soapstone material, which is fragile and can disintegrate over time. Cool your wine while retaining its flavor. Retains the cold of your drink for a longer time without diluting them. Note: these chilling cubes will not get your drink as cold as ice. But they sure do not dilute your drink either! Elegant presentation box makes our Whiskey Stones set suitable for any gift-giving occasion. Such as a unique gifts for: Valentine's Day /"I am sorry" gift /wine lovers.