Amazon has the Gerber Bear Grylls Survival Series, Compact Scout Knife for only $7.49. This is the drop-point version that I am a big fan of. The Compact Scout is small enough to be annoyance-free in your pocket or on a keychain. The partially-serrated edge makes it crazy versatile and capable of cutting a seat-belt if the situation ever arises. As you might expect, customer reviews are excellent. I'm tagging this one a no-brainer.