I have peanut lighters scattered throughout my kits; a couple times a year I put a few more drops of fuel in them and after two or three years they need the O-rings replaced. Generally each kit has a Bic (with the button secured by a cable tie) and a peanut lighter.

The Tohil that Phaedrus mentions feels a LOT more well-made and seals up super-tight. I only have one but I like it a lot.