This stainless steel ice cube set is a perfect choice to cool down drinks without eliminating drinks! The ice cube is made of food grade stainless steel which is non-diluting and resuable.It's filled with non-toxic gel to keep the cubes cold.In order to achieve best result,it is recommended to freeze one hour before using.The ice cube set comes in a protective plastic travel case which can be customized with your brand name or logo.Laser engraving on the ice cubes are available.