CampStove from BioLite, $129, allows you to cook your food and charge you iphone all by burning twigs or anything else you can get your hands on.
How it works
BioLite Stoves convert heat to electricity that powers a fan to make the fire ultra-efficient. Extra electricity can be used to charge small electronics like mobile phones and LED lights.
No fuel to buy or carry
Stoves cook your meals with nothing but the twigs you collect on your journey, eliminating the need for heavy, expensive, polluting petroleum gas.