World’s best teacher etched into a 20 oz powder coated stainless steel tumbler.  20 oz. Stainless Steel Polar Camel Tumblers features double-wall vacuum insulation with a clear lid. The mug has a narrower bottom to fit most standard cup holders. It is 2X heat & cold resistant compared to a normal tumblers. Polar Camels are made from 18/8 gauge stainless steel (18% chromium/8% nickel) - also known as Type 304 Food Grade. Overall Size: 3 3/8"(L) x 6 7/8"(H) We can also etch your company logo on the opposite side of the tumblers. In order to etch logo, we need a native design file. Native file would be one of the following formats: - Adobe Illustrator - .AI - Black & White JPEG Upload product photos