Shop Klean Kanteen 27oz Kanteen Classic w Loop Cap. Our most popular size, the 27oz Kanteen® Classic is perfect for your on-the-go life. Whether you’re trying to juggle a full day of classes or work, or a trip to the dog park between your workout and happy hour, just one or two fill-ups will help you stay hydrated and happy all day. The 27oz is available with the Sport Cap 3.0; featuring a soft silicone spout, 25% higher flow rate and
chirp free hydration. Easy drinking and no whistling sound! Klean Kanteens are made from high quality, 18/8, food-grade stainless steel; totally free of BPA and other toxins. Because stainless steel itself is safe, we don’t need to coat the inside of the bottle with a plastic or epoxy lining, one of the main differences from aluminum bottles. Stainless caps are also available and all of our caps are BPA-free.