The ability to quickly get some water boiling cannot be overstated. To purify water, to provide warmth to your core, and to cook foods in a way that captures all the vital nutrition you can is a smart strategy to consider. All of the stoves found here can utilize natural fuel sources. Dry twigs and grasses, mosses, bark -- these can be used in a surprisingly short amount of time to heat water to a boil provided you also have thought to bring an appropriate container for the purpose. A simple steel cup and stove platform can make the difference between warmth and comfort and utter misery or worse. Some are designed for home or camp use in the event of a true disaster where traditional fuel sources become limited or non-existent.