By pressurizing seawater to 800 lb. per square inch, then forcing the water through a semi-permeable membrane, PUR's Survivor 6 eliminates virtually all bacteria, viruses, and 98.4% of the water's salt content - so you can survive long after pre-packed water supplies run out. The compact Survivor 06 takes up less space and weighs less than three pints of canned water, yet it can produce up to two pints per hour of fresh water (or six gallons daily). This is enough to hydrate up to 20 people! Simple manual operation. Non-corroding, glass-reinforced thermoplastic construction. Measures 5''H x 8''L x 2.5''W. One-year warranty. USCG Approval #160.058/7/0