The Cadence Tempo Water Bottle (22 oz.) is a Purist bottle from Specialized with a MoFlo valve. This means it's infused with silicon dioxide, which forms a protective glasslike barrier inside the bottle. In turn, this helps prevent odors, stains, and mold from attaching to the inner surface.
Oh, and it looks great too. Grab this Made In USA bottle asap, as they are only made in limited quantities!