Ok so you picked up a pack of disposable lighters. One by one you use them until the lighter fluid is depleted. But wait! they aren't useless. Why not save them?
Why would I want to save them you ask? For their flint of course.
By saving the flints, the next time your zippo flint runs our you will have a spare instead of trying to hunt down a pack of flints at the grocery store.
Zippo lighters are good to have on hand due to their ability to light a flame even on a windy day. They are definately more dependable than the standard disposable lighters.