We are offering pitcher tech water filter, 1. patented flow control designcontrolling the time of raw staying inside the filter elements, it will flow out after going through complete filtrationthrough bacteriostasis activated carbon and sodium-less ionexchange resin. 2. media: use 100% food grade filter materials. a: silver impregnated bacterial inhibition activated carbon:effectively remove rganic contaminants, chlorine, trichloromethane and insecticlde. b: non-sodium cation exchange resin:remove inorganic contaminants, lead, copper and cadmium etc. Hightly toxic metals and lime. 3. patent: m337330(taiwan), 1164483(china).