The Purist Omni Bottle features an amorphous silicon dioxide coating infused into the inner wall of the bottle, creating a glass-like finish that provides a natural and completely inert solution to prevent drinks from staining the bottle or leaving behind residual aftertaste. This infusion also shields fresh water from tasting like plastic on very hot days, making it akin to drinking straight from a sparkling clean glass. The Omni Self-sealing Heart Valve(TM) delivers a high rate of flow with a leak-proof design, even when the valve is open. The bottle features a refined no-slip grip design and polished surface for easy use. The smaller mouthpiece size provides better mouthfeel and easier engagement, with a simple hands-free open and close valve that requires nothing to turn.