Gravi-Stil Emergency Non Electric Water Distiller/Gravity Combo with Auto Fill Feature Kills Bacteria, Viruses, Protozoa and removes Heavy Metals, Salt Non-Electric Water Distiller With Auto Fill Feature Producing 8-10+ Cups per Hour Gravity Water Filter Producing upto 6 gallons per hour (using high speed mode) Turn Ocean water into potable sterile water Makes All Water Drinkable and Sterile