It's not really enforceable, as the user could simply copy the container off the stick, try a few times, and then copy it back and repeat.
That's a good point. So you are saying that there would need to be an option to prevent the container from being copied or moved, to enable the enforcement of a rule to wipe the container after x failed password attempts?
Sounds like I'm asking for too much here!
you can't enforce anything without some software running on every machine preventing the copy, or support by the hardware itself - it's not possible, think about it - I can plug that stick into anything, even a digital camera - what's to stop me copying the file then?
If you need something like this, then you need to be using our hardware encrypted USB sticks - they prevent this kind of malarky.