Eastman Chemical Company’s Eastman Tritan™ copolyester and Eastar™ copolyester for carbon filtration and reverse osmosis systems meet the requirements of the National Sanitation Foundation (NSF) for water filtration units and deliver the benefits of transparent filter housings with excellent durability, improved chemical resistance and toughness. Unlike polycarbonate (PC), both materials are made without bisphenol A (BPA), a big advantage for brand owners looking to answer consumers’ needs for BPA-free products.