A Premium Drinking Experience with the Zero Degree Tumbler Our Zero Degree Tumblers are double-walled and vacuum sealed for perfect insulation and temperature retention. They will obviously 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. Keep the temperature sealed in with our clear shatter-proof lid, with a wide splash-proof and straw-friendly opening making it easy to drink from. Made with easy to clean and machine washable kitchen-grade 18/8 stainless steel, they are puncture, corrosion, and rust resistant. With the no sweat exterior you will not experience any condensation, so it will never leave a ring on your coffee or dining tables. This makes the ideal drinking companion at home, on your way to work, at the office, around the campsite, or anywhere else!