ZeroWater is not an ordinary water filter! ZeroWater delivers a unique 5-Stage Ion Exchange technology compared to conventional 2-Stage filtration. Enjoy the purest tasting water with a filter that removes 99.6% of TDS (total dissolved solids) from your tap water, such as Aluminum, Zinc, Nitrate, Fluoride and more! It is the only water filter that meets FDA standards for TDS in purified bottled water. This provides you with a pour-through, gravity fed filter certified by the NSF to reduce Lead and other heavy metals; such as Chromium 3 and 6. This 12-cup pitcher features a push-and-pour spout so you can conveniently fill your cup with one hand. You will know when its time to change your filter as every pitcher comes with a water testing meter, which measures the total dissolved solids in your water.