Our Gravity Powered™ water filtration systems are designed to perform during emergencies, disasters and more. Which means they’re more than ready for survival use, daily use, emergency preparedness, outdoor recreational activities, food storage planning and more. With more than 20 years of “in-the-field” use by organizations like The Peace Corps and Samaritan's Purse, Outback emergency water purifier systems are proven to perform, highly-portable and simple to use anytime the need arises.