The design allows a user to pour water from an untreated source, such as a river or well, into the pot and allow it to filter through into a five-gallon bucket underneath. The pot has a flow rate of one to three liters per hour, enough for drinking and cooking. The filtered water is accessed through a spigot in the bucket.
The ground is now covered by impervious streets and buildings, which do not allow rainwater to leech into the aquifer below. In some parts of the country the natural aquifers have been irreparably damaged due to over use without replenishment. The use of water is becoming more and more restricted every day. The recycling of water as part of the green movement is gaining popularity in the United States.