Another cheap option was something I learned from my Dad. He worked his whole over 18 career at a corrugated box factory. Of course, they have seal coat/wetloc machines (one sided wax and infused was inside and out on both sides). What he used to do was take a tuna fish can, use an old fashioned oil can opener (or one of the metal can openers with punch top) and make holes on the side for oxygen, and cut a wetloc box (that's the infused wax box, like you see in supermarkets for some produce and frozen meats) so it would fit into the can with just a small amount of room from top of corrugated to where top of can is. He would roll it of course. So looked almost like a cinnamon roll shape in it. He would melt some extra wax to melt over it and seal it into the can. Would ignite fast and had a can cut for it just a tad bit bigger to toss over it to extinguish it. You could put a small pan over the top of it and it would cook up super fast. Cheap and easy to make (and anyone can still make it). Just my Dad had access to make them super easy. In fact, he used to make firestarters with the bad wetloc boxes.