• Advanced 5-stage filter for better taste and superior filtration. • Removes almost all total dissolved solids for a pure taste. • IAPMO certified to reduce lead, PFOA/PFOS, and mercury. • Each filter has an estimated lifespan of 15 gallons, depending on water quality. • Change the filter when the TDS meter reads 006 for best results. • Compatible with ZeroWater filter systems. • Saves up to 110 single-use plastic bottles per filter, or up to 660 bottles per year. • Includes 8 replacement ZeroWater 5-stage filters with ion exchange technology.