Visit Tervis to shop for truly amazing drinkware which is double-wall insulated and dishwasher safe. High-quality Tervis tumblers made in America since 1946 are completely customizable, and are equipped with a lifetime guarantee, portable cooler, self warming system and dishwasher armor. Designed by engineers Frank Cotter and G. Howlett Davis this unique drinkware was made to keep hot drinks hot and cold drinks cold. Originally offering just a tall, cylindrical permanently sealed, double-walled tumbler, Tervis is now offering 10 tumbler sizes, along with a number of customizable designs, emblems and accessories. At Tervis customers can also create a lifelong keepsake or the perfect gift by customizing the products with their favorite photos, images or text. Or customers can have the already existing designs personalized with the name or initials. Currently this family-owned-and-operated business is headquartered in North Venice, Fla., employing around 1,000 qualified personnel. The company accepts Visa, MasterCard, Discover Card and American Express. Within the continental U.S., Tervis offers shipping by ground, second-day air and next-day air. There is free ground shipping on all online purchases totaling $75 or more. Tervis ships outside the continental U.S. as well, but such orders should be placed by phone.