Forever matches

[Vtec44]

I bought a few of these from Amazon for fun. They work much better than I expected, even when wet. The flint stick has a nice spark, so even if the match doesn't light you can still have a way to create a spark.

[gorn5150]

I have one of those I bought at a flea market in Stockton in the late 60's. It still works.

[sealocan]

There are nicely made ones and very cheap ones.

The big benefit they have over the Zippos and the like, is if the O-ring gasket is in good condition and seals tightly the fluid will not just evaporate.
And you'll be able to use the lighter for a long time without the need of constant refilling
And unlike BICs you will be able to use different types of flammable substances.

(You know, for years after the zombie apocalypse.)