This vacuum insulated TKWide bottle was designed with versatility and portability in mind, to create the best water bottle, coffee mug, sport bottle and insulated cup, all in one package. The 12 oz TKWide features the TK Closure™ internal thread design with smooth, rounded lip for comfortable drinking and easy cleaning. Comes with the leak proof Café Cap with easy-carry swivel loop. THIS MUG HOLDS TEMPERATURE EXTREMELY WELL