The Marin/Polygon Water Bottle is designed to be as compact as possible, adding minimal height at the valve so riders with smaller frames and tight-fitting dual-suspension mountain bikes can finally get a bottle that fits. These water bottle carries 600ml of water in a BPA Free soft squeeze polypropylene bottle topped off with a low stack Quench Flow valve lid, specifically designed to keep dirt and mud outside of the valve and, with a quick wipe, out of your mouth! When you pair the Entity WB600 Water Bottle with the Entity BC45 Side-Pull Bottle Cage, you get two products that were specifically designed to work perfectly together, for optimal bottle retention on rough terrain and ease of use in even the most compact frames. Features: Quench Flow Valve keeps dirt and mud away, boasts a fast