It is a part of Keurig Green Mountain, Inc., which is headquartered in Waterbury, VT. Its main product is the K-Cup, a single-serving coffee brewing system. Ground coffee beans are packed in the K-Cup and sealed air-tight with a combination plastic and foil lid. Keurig licenses its K-Cup technology to coffee roasters and tea makers such as Green Mountain Coffee Roasters, Diedrich/Gloria Jeans, Timothy's World Coffee, Van Houtte, Caribou Coffee, Celestial Seasonings, Bigelow Tea Company, Twinings, Tully's, Coffee People and Newman's Own.