Each bottle is infused with silicon dioxide (SIO2) in a process known as Plasma Enhanced Chemical Vapor Deposition (PECVD). In this process, silicon dioxide is added to the polymer structure of the inner surface of the bottle, forming the protective glass-like barrier that prevents odors, stains, and mold from permanently attaching to the inside surface of the bottle. With just a simple rinse of the bottle, the layer ensures that water from the bottle does not taste like plastic or the previous liquid. This infusion is added after the bottle has been molded and is chemically bonded to the bottle wall. The barrier is extremely thin, just 20 nanometers—over 5,000 times thinner than a human hair.
By infusing the silicon dioxide, no compromise is made to the structure. The bottle remains totally flexible for easy drinking. It will not delaminate or fall off, even when the bottle is flexed over time.