These containers are available in anodized aluminum and stainless steel and fitted with a filter lock made out of techno-polymer. The filter fixing system is manufactured from polysulfone resin, which is a thermo-plastic material designed for steam sterilizing efficiency. This kind of resin is known for its resistance to extreme temperatures. It has outstanding properties of resistance to chemical agents and mechanical stress. When used with the stainless steel container construction, it guarantees a high-resistance to the new disinfecting and cleaning processes involving alkaline and oxidizing agents. The filter lock is designed help with the replacement of filters in the container. The silicone gasket mechanism ensures that steam and air can only enter the container through the filter.