CBC cartridges are made of activated coconut charcoal prepared by the carbon block technology (—¬—). They have higher sorption ability than granulated charcoal. This cartridge efficiently removes chlorine from water and improves the taste, color, and odor of water. Silver incorporated in the cartridge material suppresses the reproduction of bacteria inside the cartridge. The carbon block cartridge passed the NSF certification, i.e., it meets the world’s most stringent quality requirements.