We fired up our Kelly
Kettle for the first time
today.
It's like a rocket stove with
a double-walled chamber for heating water.
Handy to have around during a
power outage. You can boil water in about 3 to 5 minutes with a few
pages of junk mail and some sticks.
This kettle might profit from some insulation on the outside. It would prevent heat loss and keep you from burning yourself on the outside.
A couple of layers of fiberglass exhaust wrap might do the trick, I think. Although stone wool overwrapped with aforementioned wrap or plain fiberglass strands would probably insulate even better. Both materials are inflammable.