These Stainless Steel Tumblers features double-wall vacuum insulation with an engravable silicone grip. The mug has a narrower bottom to fit most standard cup holders. It is 2X heat & cold resistant compared to a normal tumblers. They are made from 18/8 gauge Type 304 Food Grade stainless steel with seamless construction so there is no leak point. 6 7/8" tall.