Klean Kanteen bottles are all made of high-grade stainless steel, are pleasantly lightweight, completely reusable, and entirely eco-friendly because their tops and spouts are made with bisphenol A-free plastic (BPA). These Klean Kanteen reusable bottles are durable enough to last a lifetime, and are as easy-to-clean as they are to carry. A reusable bottle for people of all ages; a bottle that keeps drinks fresh and clean-tasting no matter how many times you refill it; and a simple design engineered for function in every way - thats Klean Kanteen.