The original purifier that put us on the map. It's compact, fits in virtually any backpack pocket and provides global protection from waterborne pathogens (VIRUS, bacteria, protozoan cysts), pesticides, chemicals, heavy metals and microplastics. In fifteen seconds, it makes 16 ounces (473 ml) of safe, clean drinking water – anywhere on earth.FEATURESCompact – fits in most backpack pockets and cup holdersOnePress™ Global Protection empowers travelers and adventurers to make the world’s sketchiest water sources safeRemoves: waterborne pathogens (viruses, bacteria, protozoan cysts), including Rotavirus, Hepatitis A, Norovirus, Giardiasis, Cryptosporidium, E. Coli, Cholera, Salmonella, Dysentery and moreFilters: particulates (sediment, microplastics) and many chemicals, pesticides, and heavy metalsPurifies (and filters) contaminated water in 15 seconds (2 liters per minute)Replaceable purifier cartridge rated for 300 cycles (40 gal. / 150L)Saves money and waste; travel sustainably and never buy single-use bottled water againTested to NSF Standards 42+53