Reusable, lightweight, and risk-free 27oz stainless steel bottle comes with your sports drinking cap made from safe, non-leaching polypropylene. Klean Kanteens are a safe alternative to plastic and lined metal containers and are made from high-quality food grade 304 L.N. stainless steel which is durable, lightweight, reusable and 100% recyclable. Slim design fits most cup/bottle holders. Non-leaching & toxin-free, no inner lining andclean tasting