When you finish making a solar cooker — it should only take an afternoon — it might look something like this.
PHOTO: SOLAR COOKERS INTERNATIONAL
Black pots work best in a solar cooker.
SOLAR COOKERS INTERNATIONAL
Diagram shows relationship of inner box to outer box and method of making lid.
To make clean, straight folds, press first with a blunt edge such as a spoon handle, then fold against a firm straight edge.