Brita Water Filter Bottle Replacement Filters fit all Brita Hard Sided and Sport Water Bottles. These filters are BPA free and help reduce chlorine taste and odor commonly found in tap water to deliver great tasting water every time. One filter can replace 300 standard 16.9 ounce plastic bottles resulting in less money spent and less plastic waste. For optimum performance, filter should be replaced every 40 gallons or very two months, whichever comes first. Use Brita for better water, a better world, and better value.