Puralytics SolarBag Water Purifier (3-Litre) Eliminates 99.9999% bacteria, 99.99% Virus, 99.9% Protozoa, and reduces heavy metals and manmade chemicals The SolarBag is a reusable portable water purifier that cleans 3 liters at a time Offers the broadest protection of any portable water filter, and is the only non-powered, non-chemical device to meet US EPA standards Sunlight activated nanotechnology water purifier destroys contaminants instead of merely trapping them, no pumping, sucking or back flushing, simple to use, self-cleaning mesh doesn't clog, reusable 100's of times while producing clean tasting water time and time again Designed for emergency preparedness, international and remote travel, mission teams and disaster relief, back country camping, backpacking, remote hunting and fishing camps and exploratory groups where clean water is not always available