The tumblers are double-walled and vacuum sealed for perfect insulation and temperature retention. Keep your drinks hot or cold far longer than any standard drinkware, and the color won't fade, peel, or crack with frequent daily use. Made with easy to clean and machine washable kitchen-grade stainless steel, they are puncture, corrosion, and rust resistant. This double wall vacuum insulated tumbler makes the ideal drinking companion at home, on your way to work, at the office, around the campsite, or anywhere else. 6 1/2" H x 3 11/32" D.