Replacement Filter Cap for the Aquapure Traveller Filter Bottle. Now proven to reduce microbiological hazards AND over 100 harmful heavy metals, pesticides and other hazardous chemicals, including arsenic 3&5, cadmium, mercury to NSF 53 standards were reduced by 99.9%. Fluoride tested to NSF 53 standards was reduced by 95%. The unique purifier incorporates our MAD (Mechanically Advanced Disinfection) technology that eliminates >99.9999% bacteria, 99.999% viruses, >99.99% larger pathogens. >99.9% of many chemicals, heavy metals, dirt and odour.