S.D.,
What do you want to do with the compass?
I have mixed feelings about button compasses.
If you kind of lost, but are familiar enough with the area that might be able to figure your way out IF you can walk a straight line - or go in a particular direction - using a compass, then a button compass could really help.
If you are really really lost ...
If you've told someone you trust where you were going and about when you'd be back ... and they'll likely start looking for you reasonably soon, then my advice would be to stay put, stay safe, and make yourself as findable as possible. A compass is unlikely to help you.
If you are really on your own, nobody is coming anytime soon, and you haven't a clue where you are or how to get unlost, then first give yourself a big old kick in the butt for getting yourself into this kind of a jam. A button compass probably won't help much, but at least it will help you walk in a straight line ... and might give you a tiny bit of confidence. I hope you make it.
I think you'd be much better off carrying and learning how to use a small clear plastic baseplate compass AND carrying a paper map of the area.
I always recommend selecting a compass that has "adjustable declination" and pre-adjusting it for your area.
My favorite is the Suunto M-3 Leader. Its rock solid.
For a more basic compass I'm intrigued by the newish Brunton O.S.S. 20B Compass available from REI for $15. I don't know the details but apparently Brunton, which was originally an American company, then purchased as a subsidiary of Silva of Sweden, which in turn was owned by somebody else from Europe ... anyway, somehow Brunton separated from all of the above and is now its own small company dedicated to making newly designed high quality compasses in the U.S. How can I not support that????
They appear to be based on the eclipse design they used in expensive fancy compasses in years past. Those "eclipse" compasses used to have a problem with bubbles forming, but I hope with all my heart that they've fixed that issue.