To make a solar cooker in 5 minutes Kathy Dahl-Bredine says "While experimenting with various designs of cookers to introduce in the indigenous communities where I live and work in southern Mexico, I hit upon an utterly simple way to make an instant portable solar oven. Take a reflective accordion-folded car windshield shade and turn it into a version of the solar funnel simply by attaching little Velcro tabs along the long notched side."
"I have found this totally simple solar oven extremely practical, as it is so lightweight and easy to carry along anywhere. But in addition, it has reached a higher temperature in a shorter time than all the other models I have experimented with so far (I haven’t used a parabolic) - a little above 350°F (175°C). I have cooked black beans in about the same amount of time as on a gas stove; I’ve used it to bake breads, granola, brownies, lasagna, all sorts of vegetables, and to purify water. The sunshade may not be available everywhere, but I suspect it can be found in most urban areas, since I found it here in southern Mexico. The Velcro was also available in fabric stores. Cost of the sunshade was about $3.00 USD; the Velcro about $.25."
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