Lifesaver Bottle 6000 Ultra Filtration Water Bottle Replacement Cartridge LIFESAVER Technology filters out bacteria, Viruses, cysts, Parasites and fungi from water Filters 6,000 liters/1,585 US gallons of water Tested by independent Test house to meet adaption of ns' protocol 231 Failsafe - an automatic indicator when the cartridge needs replacing BPA and bps free Lifesaver replacement cartridge 6000 liter Replace when bottle stops working