Founded in 1946 by two engineers who got tired of drinking lukewarm coffee and cocktails, family owned, Florida-based Tervis® designs and manufactures insulated drinkware and accessories. The revolutionary insulated tumblers use a double-wall technology to harness the natural insulating properties of air; this both reduces condensation and keeps beverages hotter or colder longer. Each tumbler is made in America. The drinkware is available in a variety of sizes and configurations including the My First Tervis line of sippy cups with lids. Additional products include tumblers, mugs, cups and water bottles along with accessories such as handles, travel lids, straw lids and straws. The microwave, freezer and dishwasher-safe beverage containers and tumblers fit in most cup holders; the sippy cups feature child-friendly handles and a valve and gasket to help reduce spills. The drinkware is designed to keep hot beverages warm and cold beverages cool.