Product review (5 stars): I used these for years-They are GREAT !
I have used them for camping and hiking on cold days. There is a method to lighting them, remove the flamles wick, fill the container with lighter fluid. Light it with the wick still removed and let it flame for a minute.  Put out the flame and place the wick on.  It will keep warm for hours...These are so much better then the chemical warmers. Those last for a couple hours at most and then they are in the trash can the're a waste. This handwarmer can be used repeatedly for years.  Get one you will like it.