Keurig is an American manufacturer of coffee brewers for both home and commercial use. 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. Each K-Cup is a plastic container with a coffee filter inside. Ground coffee beans are packed in the K-Cup and sealed air-tight with a combination plastic and foil lid. When the K-Cup is placed in a Keurig brewer, the brewer punctures both the foil lid and the bottom of the K-Cup and forces hot water under pressure through the K-Cup and into a mug or cup. Initially used only for coffee, K-Cup varieties now include tea, hot chocolate, iced teas and coffee, as well as fruit drinks. 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.