This emergency water purification system is essential to emergency preparedness kits for use during disasters such as floods, hurricanes, and earthquakes. Simply install the compatible purifier to the 1-liter light-weight durable pouch or a plastic bucket of your choice (not included) and you"re setup with a large-volume gravity purification system that can be used to filter hundreds of gallons per day. Use the included faucet adaptor to drink straight from the tap during boil alerts or in other emergencies when safe drinking water is compromised. This is a great choice for relief agencies or support groups travelling to areas where the water source is compromised or in question. Chemicals and electricity are not required.