I get used chew cans, cut cardboard strips, the height of the can! Cut a piece of cotton rag or heavy cotton string! Lay the string on the cardboard, rollup and put in the can. Fill the can with paraffin wax. The string is the wick, cardboard and paraffin the fuel. I ask friends to save the all plastic cans, and make ten or twenty at a time. They will burn for ten to fifteen minutes. The only time I needed to use one, i just kicked the knots out of a dead doug fir, all rotten and gray. The knots are so full of pitch, water doesn't soak in the knots. The knots once started will burn in a good rain. Road flares are in the truck, never carried in my pack, yet!! Never tried the cotton ball and boy butter thing!