This insulated vessel does triple duty as a coffee mug a water bottle and a pint glass the kickbakrsquos vacuum insulated double walled design keeps drinks cold for 8 hours and hot for 4 the lid is also designed to switch between hot and cold drinks it flips back to offer small opening for sipping and a larger one for chugging plus it snaps easily into place to stay out of your way while you drink vacuum insulation keeps beverages cold for 8 hours and hot for 4 hours splash proof dual flip lid