Our 16 oz TKWide insulated water bottle was designed with versatility and portability in mind, to create the best water bottle, iced coffee mug, sport bottle and insulated cup, all in one package. The TKWide 16 oz features our TK Closure™ internal thread design with smooth, rounded lip for comfortable drinking and easy cleaning. Comes with the leak proof Twist Cap with built-in reusable steel straw. (fits 16 oz size) NOTE: Twist Cap not suitable for liquids above room temperature. Not intended for hot or carbonated beverages because of steel straw.