30 oz. Stainless Steel Tumblers features double-wall vacuum insulation with a clear slide lid that completely seals. This tumbler has a narrower bottom to fit most standard cup holders. It is 2X heat & cold resistant compared to a normal tumbler. Our tumblers are made from 18/8 gauge stainless steel (18% chromium/8% nickel) - also known as Type 304 Food Grade.
