The Klean Kanteen Wide 40 oz. water bottle is a favorite for backpackers and outdoor lovers due to its large size, lightweight single wall construction and wide mouth. The wide mouth fits most backcountry water filters for clean and safe water anywhere. Included Loop Cap has a stainless steel base so your favorite beverage never touches plastic. BPA-free eco-friendly, doesn’t retain or leach flavors, 100% stainless steel interior. Dishwasher safe, reusable & 100% recyclable.