The Purist Hydroflo Water Gate Bottle features an amorphous silicon dioxide coating thats infused into the inner-wall of the bottle. Essentially, this forms a glass-like finish that provides a totally natural, & completely inert, solution to the problem of your drinks staining the bottle or leaving behind any residual aftertaste. This infusion also shields your fresh water from tasting like plastic on very hot days, making it akin to drinking straight from a sparkling clean glass. The silicon dioxide coating is a mere 20 nanometers thick which, for comparison, is less than 5, 000 times thinner than a human hair. Meanwhile, the shape of the bottle feels equally perfect both in the hand & in the cage. This version has our Hydroflo Water Gate cap & bottle shape. It features a self-sealing Heart Valve™ thats completely slosh-proof on the bike, but when you want a drink, a squeeze on the bottle delivers a massive rush of water. However, youre able to pop the valve down for an absolute leak-proof seal for when you toss full bottles into your race bag. in addition, Hydroflo features a new three-shape design that not only improves the actual handling of the bottle, but it also secures its position within your cage. We recommend a simple rinse & dry after use, but if you want to wash it, take care not to scratch the inner surface of the plastic. Alternatively, itll be fine on the top rack of your machine. Purist infusion shields the bottle form odor, stains, & mold to keep your water pure & your bottle clean. Proprietary engineered resin delivers the most flexible bottle ever designed. Ergonomic, three-sided design makes it easy to grip, & its form fitting to the h&. Simple hands-free open & close valve: Nothing to turn. 100% leak-proof top locks down for transport or mixing powdered drinks. Self-sealing Heart Valve™ delivers a high rate of flow with a 100% leak-proof design—even when the valve is open. Rubber over-molded on the outside of cap for an easy grip.