Wood-Powered Camp Kettle Heats Water Fast ? if You Can Light It

To use the mKettle, you build a mini fire in its removable base. The flames travel up through the chimney at the center of the aluminum canteen, heating the surrounding cylinder of water to a boil inside 10 minutes. That's the theory, anyway.

Source: http://www.wired.com/reviews/2011/09/mkettle/

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