Unrivaled Ease, Speed & Convenience. No other portable purifier rivals the speed, simplicity and effectiveness of GEOPRESS. In eight seconds, it makes 24 ounces (710 ml) of safe, clean drinking water – anywhere in the world. Effective on all seven continents, you can 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.