Solar Cookers - Parabolic Solar Cooker - http://www.youtube.com/watch?v=nSLD0Ygu91Q
Solar Cooker - Cooking with the Help of the Sun; Without Smoke
If you could heat up your water using renewable energy from the sun, solar cooking is definitely possible. There are plenty of solar cookers nowadays. They all have a feature that takes care of collecting the sun's rays and focusing them to come up with heat that can cook food. The Solar Barbecue CookUp 200 is a good example.
This solar cooker is made from wood and aluminum. Its reflector is made from polyethylene terephthalate (PET). It weighs 212 ounce. It will take up 47 by 28.5 inches of land. Its base is stable and there should be no problem placing it on soil or grass. The dish of this solar cooker has a diameter of 39.5 inches. In addition, all parts of the unit are replaceable.