Stainless Steel Ice-Cubes, 8 Reusable Ice-Cubes StonesThe stone is made of food grade stainless steel, which is durable and never rust or corrode. The surface is very smooth, the ice Cubes are non porous and do not add contamination to the drink. They are easy to clean and store. After use, simply rinse it with water and place it in the plastic storage box. Dishwasher safe Whiskey Stone keeps your drink cold without dilution, preserving the taste of the drink, so you can try a tastier and softer whisky.