I pressed my old Jone-E hand warmer back into operation after many years in storage. That old naptha burning mini catalytic heater still does the job. A few squirts of Ronsonol and it lights up and stays toasty warm for hours. If you bury it too deep in your pocket it will have a tendency to go out occaisionaly but it relights quick and is back on the job.
Anyone remember these ? They were very popular in the 1950;s and 60's, particularly among hunters, fishermen, snowmobilers, skiers, and outdoor workers.
The whole trick in getting them to work is to be careful not to overfill. Best to underfill than overfill. A littlke bit of fuel lasts hours in these things.