Aquamira's Frontier Pro Portable Water Filter System is a highly effective water treatment system that fits in your pocket. Drink directly from any water source or fill up a bottle or bladder, attach the Frontier Pro filter and start drinking! Use it as a hanging drip filter, too. The Frontier Pro is effective for up to 50 gallons of water and uses Aquamira's advanced Miraguard Technology to suppress the growth of algae, fungus, mold and mildew in the filter. The Frontier Pro removes greater than 99.999 percent of bacteria, Cryptosporidium and Giardia as well as dangerous microorganisms from source water, without tablets or waiting. It's compact, lightweight and easy to use.