The Purist MoFlo Bottle features an amorphous silicon dioxide coating that's infused into the inner-wall of the bottle. Essentially this forms a glass-like finish that provides a totally natural and 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 5000 times thinner than a human hair. Meanwhile the shape of the bottle feels equally perfect both in the hand and in the cage. It comes equipped with our MoFlo Water Bottle Cap which delivers 50% more water than other traditional caps. The MoFlo valve is also easy to open effortless to use and 100% leak-proof when closed.