Stainless steel ice cubes are a must for the serious whiskey or wine lover in your life. These 1.5" stainless steel whiskey stones will keep their favorite beverage chilled to perfection without the dilution of regular ice cubes. All of our stainless steel ice cubes are made from 304 food grade stainless steel. They are then filled with a non-toxic food safe liquid gel that freezes, which makes these whiskey stones stay cold longer than traditional rock-based whiskey stones. Because of their large size you only need one to two whiskey stones to cool a drink of any size. Average size stainless ice cubes, at best, measure barely over an inch wide meaning you would need 3-4 of these whiskey stones to achieve the same chilling effect.