I figured this was the best board to ask this since I've seen threads about first aid kits before.

I'm looking for a first aid kit that goes in the trunk of a car as a Christmas gift for my sister.
I would like to give her something above a spartan basic kit because she's a registered nurse.

I don't know what to look for. Links or models to search are very welcome. Budget is $20 - $30 burgerbucks