Not only does it look awesome, the Steel-Ice Cube provides cooling without dilution. Completely food safe, the cubes are stainless steel and have a non-toxic gel sealed inside. Just keep the cube in your freezer and drop it into your on the rocks drink to drop its temperature instantly. 1" cube that can be imprinted on one side. This set comes with four cubes and a tray that allows you to pop them into your drink without your fingers warming them up. Imprint area: 3/4" X 3/4" on one side. Laser.