>>how about pernament matches, they are cheap, smaller, waterproof. a little harder to lite though... <<
I have a few of those. They vary considerably in quality depending on the manufacturer, but I like them in general. They are very flat, small, very waterproof, refill with ordinary lighter fluid or kerosene, reliable, and if you run out of fuel, you still have a ferrocerium rod and a striker for sparks. Working more like a match, it's much easier light a fire, candle or lantern with them than with most lighters. I've got them in my two smallest kits now.
However, I brought them up some time back (years?) on this forum, and got slammed by someone who vehemently called them junky toys, and that seemed to be the end of that conversation. They are marketed mostly as a novelty item, but I fail to see much wrong with them. Heck, I'd be happy to buy a few to have Doug and Chris review them. I think they're worthy of some attention.