Double-walled bottle keeps water cool and reduces condensation. Hard plastic is 100% free of BPA and BPS, and stands up to frequent use around town and on the trail. Spout cap snaps into the handle to prevent it from getting in the way when drinking; tether securely attaches the cap to the bottle for easy filling. The half-turn cap simplifies access to your water, and the spout cap threads internally so there is no more drinking off those uncomfortable bottle threads. All parts of the Chute bottle are are top-rack dishwasher safe. 100% Free of BPA and BPS. CamelBak Got Your Bak Guarantee: If they built it, they'll Bak it with their lifetime guarantee.