This reusable ice cube is made from food grade 304 stainless steel to keep the beverage cool and mouthfeel while never diluting, rusting or corroding them. Before placing the cubes in the refrigerator, gently wet them. Freeze for 1-2 hours and start using. The plastic case keeps whiskey tartar clean and organizes when frozen, just wash it after use water, these ice cubes are perfect for all types of whiskey.Price is for set of 4pcs and already include the cost of logo -one location on the cube, if you need custom logo on the plastic case, please confrim with us.