Step 1
Take an empty tuna can and mark a piece of corrugated cardboard at the height of the can.
Cut strips from the cardboard and roll into a tight coil. Keep adding to the coil until the diameter is just large enough to fit inside the tuna can. The number of strips you’ll need will depend on the size of your cardboard sheet
Pack cardboard coil into tuna can as snugly as possible. The tighter the can is packed, the longer the “buddy burner” will burn.
Melt wax from old candles or store-bought paraffin and pour slowly over the cardboard. Once full, wait a couple of minutes and re-fill after the cardboard has soaked up the wax. Repeat if necessary until completely saturated. Allow to dry completely and store in a cool, dry place until ready to use.