BPA-free replacement filters fit all Brita pitchers and dispensers (sold separately). Advanced filtration technology reduces 98 percent of lead, benzene, mercury, copper, chlorine (taste and odor), and more from tap water. Easy-to-use design does not require you to pre-soak the filter for simple replacement. For optimum performance, replace your water filter every 40 gallons or approximately two months. One water filter can replace up to 300 standard 16.9 oz. water bottles, cutting down on plastic waste.