This 20 oz royal blue polar camel tumblers features double-wall vacuum insulation. The mug has a narrower bottom to fit most standard cup holders. It is 2X heat & cold resistant compared to a normal tumbler. It is pre-engraved with the Eagle face wearing flag style shades and has spiked hair.It is NOT recommended for dishwashers, hand wash only. The prolong dishwasher use will break down the materials used to keep your beverages hot & cold. You can also customize your own under engraveable gifts tab.