The Sagan Life Water Jug Filtration System turns ANY NON SALT WATER SOURCE into a Purified Water Dispenser. SAVE ON TRIPS TO THE SELF SERVICE REFILL WATER STATIONS. The Water Jug Filtration system removes bacteria, giardia, cryptosporidium, lead and other toxins. You'll always know you're consuming safe, clean drinking water. Even in third world countries, where viruses may be present – you're safe. Use it to avoid toxic tap water sources. Sagan Life water filter test results have been performed by independent water laboratories. Each filter purifies up to 250 gallons of water.