This white 20 oz polar camel travel mug features double-wall vacuum insulation. The mugs have a narrower bottom to fit most standard cup holders. It is 2X heat & cold resistant compared to a normal tumblers.It is pre-engraved with an Eagles face with shades and spike hair. This item is NOT recommended for dishwashers. The dishwasher will break down the insulation that keeps the beverages cold .& hot.