Purist infusion shields the bottle from odor, stains, and mold to keep your water pure and your bottle clean. • Chromatek™ liner keeps your liquids cold. • BPA-Free plastic is made from 100% FDA food- grade materials, and it's printed with non-solvent base (UV Cured), CPSC-approved ink and materials. • The WaterGate’s self-sealing Heart Valve™ delivers a high rate of flow with a leak-proof design, even when the valve is open, providing a simple drinking experience. • 100% leak-proof top locks down for transport or mixing powdered drinks. • Rubber over-molded cap for easy grip.