This is an easy trick to have your lighter always with you, on your keychain.
With a really small 3d printed pieces.
if it didn't fit cause the holder is too tight, you can slit it with a metal saw to give it a bit of elasticity.
It has be designed to fit with big BIC lighter.
I give you the .sldprt and .stl files!!!
online printing: http://www.shapeways.com/model/1073791/holder.html?li=productBox-search