The 20oz TKWide insulated water bottle was designed to create the best water bottle, iced coffee mug, and insulated sports bottle, all in one package. TK Closure™ internal thread design with smooth, rounded lip for comfortable drinking and easy cleaning. Comes with leak proof Twist Cap with built-in reusable steel straw. (fits 20 oz size)  NOTE: Twist Cap not suitable for liquids above room temperature. Not intended for hot or carbonated beverages because of steel straw.