Used once. Great condition. Screenshots used from Amazon to show product information. GRAYL water filter and purifier bottles remove ALL global waterborne pathogens (virus, bacteria, protozoa). As dirty water is pressed through the purifier media, electroadsorption permanently binds any waterborne pathogens. Multiple layers of ultra-powdered activated carbon then filter particulates and adsorb volatile organic compounds (VOCs), PFAS, chemicals, pesticides, heavy metals, flavors and odors.