food grade 304 stainless steel, it is corrosion-resistant, non-rusting, mirror-polished, and free It is an great men or women of any age who enjoy cool drinks Such as birthday gift, Fathers Day gift, Thanksgiving gift,, and New Year gift It can be directly placed in the refrigerator and freezer Takes-it out directly during use, clean it, and-then freezeing-it in the refrigerator for more than 3-hours Skull with rounded corner are very friendly to glass cup They-are clearly visible in wine or beverages Quickly physical coolings, long-lasting low temperature Stainless steel can maintain the saturation of beverages without diluting ice Therefore, you can enjoy strong