Purist technology transforms silicon dioxide, one of the most fundamental elements on earth, into a flawless interior glass finish. The glass finish is just 60 nanometers thick – thinner than a fraction of one strand of human hair. This technology provides all the benefits of typical glass, but due its ultra-thin nature, it will not crack or break. This finish creates a barrier between your beverage and the raw stainless container, making the surface completely smooth and pure for better taste and easier clean.