Brita® Bottle replacement filters may be small, but they are mighty. Made to fit all Brita® water bottles, the Brita® filter is always BPA-free and reduces chlorine, which improves tap water taste and odour. We recommend changing your filter about every two months or 151 litres so your bottle is always working at peak performance. Our Bottle filter multi-packs come in two sizes—a 2-pack to provide four months of great-tasting water, and a 6-pack that can last a full year. WHAT IT FILTERS: Your Brita® bottle filter helps reduce the taste and odor of chlorine commonly present in tap water. See the User's Guide for more details. Substances reduced may not be in all users’ water.