This instructable will show you how to easily make a functional rocket stove from recyclable cans for almost no cost.
Items you will need:
1 - No. 10 Can (Standard restaurant size can. Mine was a pineapple chunks can from a local pizza parlor. They gave it to me free.)
4 - Regular soup cans (Standard 10.75oz Campbell's Soup cans)
Insulation material. I used Perlite. It's cheap and available at any garden center. I had it on hand for my garden. You can use sand, dirt, ashes, foam, any insulator.
Hammer and nail (to punch starter holes)
Pliers (makes bending the metal a little easier, but not totally necessary)