No other purifier rivals the speed, simplicity and effectiveness of GeoPress. In eight seconds, it makes 24 ounces (710 ml) of safe, clean drinking water anywhere on earth. Tap into the world s water sources and safely drink from sketchy spigots, hotel sinks, murky rivers, wells or lakes. GeoPress protects from global waterborne pathogens (virus, bacteria, protozoan cysts), pesticides, chemicals, heavy metals, and even microplastics. Also improves taste, smell, and clarity!Testing Standards Each batch of purifier cartridges Grayl make are thoroughly tested and meet or exceed United States Environmental Agency s National Drinking Water Standards.Unrivalled ease, speed and versatility simply Fill. Press. Drink OnePress Global Protection empowers travellers, adventurers and survivalists 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 metals Improves taste, smell and clarityVirtually no setup time, and fastest performance purifies and filters contaminated water in 8 seconds (5 litres per minute)SimpleVent Drink Cap performs three functions:vents air while purifyingprotects against cross contamination, grime, and dirtallows one-handed hydration through fast-flow drink spoutSoftPress ergonomic comfort pads for non-slip, anti-fatigued pressingTopoGrip non-slip TPE placed on all heavy use surfacesSaves money and waste; travel sustainably and never buy single use bottled water again