The Purist bottle is made by Specialized and features the pure taste of a drinking glass in a flexible sports bottle. It is perhaps the most popular bottle style in the world. Castelli is sold, and is now offering their logo bottle in the Purist. Available in a 26 ounce size, the Purist uses a silicon dioxide coating to create low surface tension inside the bottle. This shields the bottle from odor, staining, and mold build-up. With a simple rinse of the bottle, Purist ensures that water from the bottle does not taste like plastic or the previous liquid.

The extremely thin Silicon dioxide coating is applied to the polymer structure of the inner surface of the bottle, forming the protective glass-like barrier that prevents odors, stains, and mold from permanently attaching to the inside surface of the bottle. The MoFlo valve delivers 15% more flow than the already great Specialized Big Mouth design. Support Castelli and enjoy the quality and performance of the Purist Water Bottle.