I hung a ResQme on the rearview mirror in the car & showed the wife how to use it.
I have another one on a keychain with a minimag solitaire & a Fox-40 Micro. Carried this overseas with me, no issues with airlines so far. I like the look of the Extrik-8R, but might get too much attention at airport security.

In the car, we also have a cheap flashlight rescue tool similar to this one:
http://www.amazon.com/gp/product/B0013BP...p;creative=9325
Figure it only needs to work once...