Twist it, sip it, save it. Our Twist Cap with built-in straw fits all TKWide bottles. Twist open the straw spout to quench your thirst or snap it closed for a completely leakproof lid. The Twist Cap is a dream come true for Klean fans who want both a reusable straw and a leakproof cap. Who says you can’t have it all? Twist Cap is also equipped with new TK Closure™ internal thread design and an easy-swivel loop. NOTE: Compatible with TKWide insulated bottles only (with internal threads). Not suitable for liquids above room temperature. Not intended for hot or carbonated beverages.