You can also cut a small piece of bycilce tire innertube for about an inch long and put it around where the gap is between the lid and the body of the zippo. This should make the zippo hold its fuel longer because it doesnt evapourrate as fast.
A zippo is much more than just something that can light a cigarette.
You can store small stuf in it if you compress the cotton balls a bit. I have a small fishhook inside it that i pressed between the side of the insert and the cotton balls. I also store all the flints i have underneath the filth and whenever i find an empty lighter i wreck the flint out of it. They work perfectly in a zippo.
I think that a zippo is a great tool. It worked perfectly for 26 years and will probably do so for the next 26 years.
For the long run it probably is much more enviorement friendly as well.
My main uses for it are:
Melting old candles in a can
Lighting acetylene torches
Lighting gas torches
crimping electrical connectors etc..
lighting the stove
use it as a candle in dark spaces
see what the wind direction is for starting camp fires
lighting fire works
used it to unfreeze things in the winter that where frozen like my biceycle lock.
And play with it

Those are the reasons why i carry my zippo all year. The only times when i dont have my full edc with me are when i am in swimming shorts. But even then my knife is not more than 50 meters away from me. And that happens maybe 10 times a year.