Compact, discrete, and ridiculously easy to usethe UltraPress Covert Edition fits into any pack pocket (or cup holder), requires zero setup, and makes 16.9 ounces of clean purifier water in a blazing fast 10 seconds (3L/min). Stealth on-the-go filtration and purification for the hiker, backpacker, hunter, or global adventurer seeking discretion and fast-flow purified water for drinking, filling hydration reservoirs, or cooking. SimplyFill. Press. Drink. Ultralight Replacement Purifier Cartridge is 100% compatible with the UltraPress. Compact and ridiculously easy-to-use, the UltraPress fits into any pack pocket (or cup holder), requires zero setup, and makes clean purified drinking water in 10 seconds (3L/min) Award winning OnePress global protection is effective on all 7 continents and empowers adventurers and travelers to drink from the worlds sketchiest freshwater sources. SimplyFill. Press. Drink. Removes waterborne pathogens including virus (e.g. Rotavirus, SARS, Hepatitis