In general, I don't like the prepackaged first aid kits. They usually contain stuff I don't need and the kit container is heavier than necessary.
I just keep my first aid supplies (basically bandaids, a bit of moleskin, antibiotic ointment, an antiseptic wipe or two, butterfly strips, antiseptic swabs, half of an elastic wrap with a couple of needles & thread tucked inside the wrap, and a couple of gauze squares) in a plain sandwich zip-lock, which I store inside a heavier freezer bag zip-lock with a few basic medications, my survival/utility items (duct tape, small knife, extra matches/firestarter, extra batteries, extra contacts, etc.). This works very well for me. I seldom ever use first aid items, even at home, so I just need a few basics in case of catastrophe.