Tervis was founded in 1946 in Detroit by engineers Frank Cotter and G. Howlett Davis when they discovered how to create a double-wall tumbler. This innovation kept hot drinks hot and cold drinks cold. Today the brand offers a variety of customizable drinkware products in several sizes. Tervis' co ... Read More llegiate sports drinkware line includes team logos such as Texas, Wisconsin, Virginia, Michigan State, Tennessee, Auburn, Nebraska, and Penn State. The Tervis Texas Longhorns Double Wall Insulated Tumbler is microwave-, freezer-, and dishwasher-safe. This tumbler is made in America and reduces condensation on the outside of the cup. Tervis tumblers are available in 10-, 12-, and 16-ounce sizes and come with a variety of accessories, such as lids, handles, shaker tops, straws, and gift bags. Tumbler lids come in 14 colors, while straws come in six colors. Shaker tops include a 1-ounce jigger, strainer, and pourer; shaker tops are dishwasher-safe and come in black.