The Aquamira Frontier Emergency Water Filter System is the perfect addition to any emergency preparedness or survival kit and camping or hiking gear. This go anywhere emergency water filter is easy to use, just attach and expand the straw, submerge the filter into the water source and drink through the straw. Compact and weighing less than one ounce, it fits in your pocket, backpack or travel bag so you can be prepared. The Frontier Filter is tested and certified to remove more than 99.9% of Cryptosporidium and Giardia. One unit will filter up to 20 gallons of water.