What's the point of carrying a lighter daily (Daily... Not criticizing all zippo carriers) if you won't use it? It's understandable if you will need it, but carrying just so you can whip it out when someone wants to light up is dumb, IMO. OP, is there a reason you want to carry a Zippo?
On topic, it will evaporate.
Let's see...what can you use a lighter for?
lighting up a smoke
starting a fire for cooking or warmth
burning the end of a nylon or similar type cord
removing an thread from your uniform button
a better than nothing emergency light
lighting a candle
to find drafts in window jams and doorways
for de-icing car and truck locks
for burning wax off of the tips of ball point pens
emergency signal mirror
as a tool for hobby and craft projects
can be used as a hand warmer
and one of my favorites...
rock concerts!
and I know there are hundreds more...these are what I came up with without thinking on it...