Cooking takes energy, a LOT of energy! Where that energy is sourced varies. You might cook with gas or electricity on a daily basis. You might use electricity converted into microwaves. You might cook on a grill or even over a fire.

Solar Ovens and Solar Cookers
Solar ovens use reflectors and an insulated cooking chamber to bake, roast, and slow-cook with nothing but sunshine, which makes them handy for camping, emergencies, and summer cooking.
Buy NowIn all cases, you need fuel. Fuel can be expensive, and fuel can be scarce -- especially in emergencies.
The Sun Oven is a super-insulated box that you can use to collect light energy from the sun and convert into heat energy to cook food. I was skeptical, but it looked cool, and sounded like a good backup to have on-hand, so I bought one.
In this video I'll unbox it, set it up, and cook a Sunday meal, compete with roast, potatoes, and carrots. Hit play and see how it all worked out.