Commercial for Brita Water Filters from the early 2000s Brita produces water jugs (BPA-free, made of styrene methyl methacrylate copolymer), kettles and tap attachments with integrated disposable filters. The filters can be recycled. Their primary filtering mechanism consists of activated carbon and ion-exchange resin. The activated carbon is produced from coconut shells. According to Brita, the filters have two effects: - The activated carbon removes substances that may impair taste, such as chlorine and chlorine compounds. - The ion-exchange resin reduces the carbonate hardness (limescale) as well as copper and lead.