My wife and I travel via motorcycle and spend a good deal of time camping. Having a light for the camp stove is important and this little life saver has been great. I work service (Hvac, plumbing, etc.) and having one of these on each of our service vehicles has turned out very handy on several occasions.
Note: You will need zippo (or some equivalent) lighter fluid to fill the case.
Quite simple construction with metal "match" which having on one end thread with gasket and on other end there is small wick. Well, there must be check before any trip if there is enough of patrol or some another liquid to make fire from sparkles. Also seems, that after some time, it would be hard to ignite fire, after wick will be shorter, because it is not possible to replace it.