1. Take the lid off the quart can.
2. Place the lid on top of the gallon can lid, trace it out
3. Punch out a hole the size of inside of the quart can lid in the gallon lid
4. Punch out the inner ring of the quart can.
5. Put the Quart can lid in the gallon can lid.
6. Drill holes in the quart can as in my picture from paint.
7. Drill holes in the gallon can as in my picture from paint
8. Put the cans together.
9. Fill about 3/4 the way full with small sticks (few inches in length)
10. Light a fire (Do not use gasoline!)
There you go.