Haha, cool. It will be interesting to see how they hold up.

I expect that workers in hydrocarbon related fields may be a good market. The smokers out there aren't allowed Bics etc. because of the accidental fire/spark potential. Last I checked, Zippos were still allowed. (Moving target - don't quote me.)

Personally I have never found a refillable butane lighter that I could rely on in the field. Too bad; hate the plastic waste, but facts are facts. Refillables are handy around home though, where an empty tank is just a minor nuisance.