I have revised the original post to include the following questions:
How do you solve the problem of accidentally pressing the button on a Bic and releasing all the gas? Do you just go with another type of lighter altogether?
I have had a couple (actually still have one in my truck console). I usually carry a small lighter in my watch pocket and reasoned the case would ensure the button didn't get accidentally depressed, draining the gas. For that, it worked well.
Unfortunately I found it made the whole package much easier to loose. While the Mini Bic itself will generally stay in the little pocket without issue, in the heavier (and slicker?) case it had a tendency to work its way out. After loosing a couple I decided just to carry the Mini Bic itself.
While I have had one case of finding an empty lighter in my pocket since going back to just the Bic, I check it fairly regularly to ensure its okay (that's how I found it empty, fortunately not when I actually needed it).
Thanks, that's exactly the type of info I wanted and exactly the problem I've been trying to solve (accidentally pressed button). Thank you to everybody who is answering the questions asked.
Regarding cost, the combination is around $10. That's negligible to me if the combination is superior to a naked Bic. Plus, the case is a one time cost. I imagine most people would rather carry a leaking Zippo that's more expensive, to each his own.
Regarding the idea of the case being heavier and hitting the ground harder, that's debatable. A naked Bic is going to drop at the same speed, unless the terminal velocity becomes a factor to make a difference. If we assume that the naked Bic falls at the same speed, it's possible that the case would provide some protection by spreading the force of impact on the Bic. I don't know for sure without experimenting. I have performed this type of experiment extensively with other objects, and so I have a feel for it. Anyway, this is a minor issue because I would have extra fire starters while I'm "out there".