This Nalgene bottle is the culmination of 50 years of learning and testing in the water bottle business, and it does not disappoint. Made with durable Tritan material, this BPA-free water bottle naturally resists stains and yucky odors. This bottle also features a threaded and tethered lid with an integrated straw that can be stored when not in use. The bottle is totally leak-proof and offers volume markings on the side for careful hydration.