Bodum Canteen Porcelain Double Wall Medium Tumbler with Silicone Grip, Purple, Set of 2 Set of 2 medium tumblers; 3-1/2-inch diameter; 4 inches high; 6-4/5 ounces each Crafted from durable white porcelain with a ribbed nonslip silicone grip Thermal double-wall construction keeps drinks hot or cold longer Design prevents condensation so coasters are unnecessary Dishwasher-safe; various colors available; 1-year limited warranty