I have a little pry tool keychain thing. It has a bottle opener and flat head on it. The pry bar bit can also act like a big flat head for things that have a coin slot meant to tighten or open it. It's not meant for nails or opening wooden crates.
Really it's useful for any poking of prying that you shouldn't be using a knife for but have a strange urge to. Also a package opener if people around are nervous about knives. The utility knife thing with a bit of crowbar glued to it probably doesn't comfort others as it looks like how someone would design a tactical box cutter.