Our 12 oz wide mouth insulated water bottle was designed for versatility to create the most flexible hydration package available . The insulated 12 oz features our new 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 12 oz size) Klean Coat colors and fun designs are great for kids and those young at heart! NOTE: Twist Cap not suitable for liquids above room temperature. Not intended for hot or carbonated beverages because of steel straw.