Very important doom device — the kelly kettle for boiling water. If you have to, you can filter out particulates through fabric, then boil water, then hopefully you will have safe water. In a collapse/doom sitaution, people are going to be dying from drinking surface water. Don’t be a casualty. When there’s no electricity, boiling water is difficult! I found this out first hand. And when there’s no electricity, boiling water is a big luxury.
The hollow kettle, made of double skinned aluminum, surrounds the fire you build in the base. The water absorbs the fire’s heat in an amazingly efficient manner. Add fuel (paper, leaves, sticks, wood) through the 2″OD vent on top. Boil 40 oz of water in 3 minutes. Cork on brass chain can be inserted to keep water hot or from splashing out while in transit.