For fresh-tasting filtered water, replace your brita filter regularly. Bpa-free brita bottle replacement filters fits brita hard-sided and sport bottles. Replacement filters sit inside the bottle, filtering out particulates and chlorine taste and odor that may be found in tap water. One water filter can replace up to 300 standard 16. 9-ounce water bottles. Keep the fresh-tasting filtered water flowing by replacing the filters every 40 gallons or 2 months. Bpa-free replacement water filters require no pre-soaking. Water filters type: bottle filter; for use with: brita hard sided bottles; brita sport bottles; quantity: 6 per carton.