Dont let contaminated water cut your adventure short. Play it safe and filter up to 30 gallons with the Frontier Filter by Aquamira. This ultra-portable water filter is designed to take along wherever you goand its highly effective against the invisible culprits waiting for you in the water. The Frontier Filter uses the torturous path method of water filtration, which traps over 99.9% of harmful Cryptosporidium, Giardia and other pathogens, including waterborne insect larvae and many bacteria