As you can probably imagine there is a sophisticated production process in place which turns your old wine bottles into a safe and effective filter media. EGFM is manufactured by a mechanically induced high-speed process that transfers energy into the glass feedstock resulting in the destruction of glass whilst rendering it sharp free. It does not grind, mill, hammer or flail the glass. It does not abrade, so EGFM retains a smooth shiny surface. The various stages in the production process are highlighted below.