The term 'water filter brand' can be summarized by two solutions: PUR and BRITA. PUR is a three-letter water filter brand that has been around since 1998. It is known for its advanced filtration technology that removes 99% of lead, chlorine, and other contaminants from tap water. BRITA is a five-letter water filter brand that was founded in 1966. It is known for its range of water filter pitchers, faucet-mounted filters, and replacement filters. Both brands are popular choices for those looking to improve the taste and quality of their drinking water.