Dear Susan, this is a very interesting comment. I am always trying to say that there is no way to identify only one and the best solar cooker. Depending on the food process it might be better using a concentrating solar cooking instead of a solar box type. I have both systems in use and it seems to be a good solution if applicable. We had good results with eggs if you put them in the solar stove without water. Our traditional way of making hard or soft boiled eggs in water is one way to get the heat into the egg. Since the air temperature in a solar stove is high enough egg white will coagulate without water. But it will take longer in a solar stove than in boiling water. If you leave the eggs in a solar stove for too long the egg white will become brown. Not a problem to eat it, but it does not look nice ... Rolf

One thing interesting about solar box cookers is the ability to use them as thermal or retained heat cookers when there is not sufficient solar radiation for cooking. David