Four stage water filtration and magnesium technology. Pitcher h ok ds 2.5 liters. Dishwasher safe and BPA free. Reduces unpleasant tastes, impurities and odurs. Helps remineralize water to maintain neutrsl PH for great tasting water. One filter cleans amount equal to 300 16oz water bottles to save mkney and the environment. Replacement filters available on Amazon.