The Purist Omni Bottle features an amorphous silicon dioxide coating infused into the inner-wall of the bottle. This creates a glass-like finish that provides a natural and completely inert solution to prevent drinks from staining the bottle or leaving behind residual aftertaste. The infusion also shields fresh water from tasting like plastic on very hot days, making it feel like 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 valve features a refined no-slip grip design and polished surface for easy use. The bottle is made from easy-to-squeeze LDPE material and includes a clear viewing strip for monitoring contents.