Description of the tumblers:
20 oz. Stainless Steel Tumblers features double-wall vacuum insulation with lid. The tumbler has a narrower bottom to fit most standard cup holders. It is 2X heat & cold resistant compared to a normal tumblers. Made from 18/8 gauge stainless steel (18% chromium/8% nickel) - also known as Type 304 Food Grade. Powder coated in a variety of colors and laser engraved.