20 oz. Leatherette tumblers have double-wall vacuum insulation with a narrower bottom to fit most cup holders. Leatherette band is not removable, must engrave while still on mug. Seamless construction. Hole on lid is big enough for a straw. Polar Camels are made from 18/8 guage stainless steel (18% chromium/8% nickel)- also known as Type 304 Food Grade.
Tumblers may have the Polar Camel brand stamped on the bottom cap of the cup. Standard lids have the Polar Camel lid shown in the listing photo. Upgraded sliding lids do not have any branding on them.