The Aquamira Frontier Pro Portable Water Filter System provides all the benefits of a larger bottle filter in a conveniently compact size. Straw-style filter attaches directly to water bottles or bladders and attached cap keeps mouthpiece clean. Flexible "Integrated Strap Grip" secures cap to filter when not in use and allows for easy cap removal. Bite valve can also be removed to use as hanging drip filter. Filters up to 50 gallons. Miraguard Antimicrobial Technology suppresses the growth of bacteria, algae, fungus, mold and mildew within the filter media.