I'm trying to develop an inexpensive solar cooler for campingI've made a solar box COOKER before, using nested cardboard boxes painted black, with aluminum foil glued on the insideThe black surface absorbs heat from the sun's rays, while when the heat is re-emitted inside, the reflective foil tends to keep it inIt is a slow cooker which can develop about 325 degrees FNow I am thinking about trying the same idea invertedI know I won't be able to freeze thingsbut if I start with something frozen, could I keep it frozen this way without having to use those pre-frozen plastic containers of blue chemical? Anybody ever make a cooler like this? anybody know how? Any sites for plans? (not the cooker sites, I already have those.)Please include ideas for evaporative cooling using wet towels, if that has worked for you in the pastI'm trying to do this no-electricity, no chemicals, no bottle of gasI want to travel light.Thanks!
