Twist Cap 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. Constructed from 90% post-consumer recycled 18/8 food grade stainless steel, its double-wall Climate Lock™ vacuum insulation helps keep contents cold for up to 59 hours. Includes a leak-resistant twist cap with built-in reusable steel straw