Camping is all about packing light and minimising bulk. When it comes to cooking, it doesn't get much simpler than a lightweight stove made from an aluminium can and a bottle of alcohol.
As the video above demonstrates, you can create this simple stove with any size aluminium can, a pocket knife, and a bottle of fuel to burn. The stove can be used to cook food in a small pot or to boil water. For a small thing, it can burn pretty hot and as the video shows around 6:30, the flames can get pretty high so be sure to follow the instructions very carefully when constructing your stove, and don't use this approach during any period of fire danger.
Turn An Empty Beer Can Into The Only Camp Stove You'll Ever Need [Tom's Bike Trip]