We were at the playground the other day and someone got a scrape and needed a band aid. My friend Lisa went to her car and grabbed a water bottle. As she got closer I realized that the water bottle was not full of water, but full of first aid stuff. She said she had a bunch of nice Nalgene water bottles that were too good to throw away when all of the BPA notifications came out. So she filled them with first aid stuff and keeps them in the car for emergencies. Brilliant!!
I found an old Nalgene I have kept around for sentimental reasons. The gear stickers remind me of the days of moon lighting at an outdoor store. I put together my own. It fits perfectly in the minivan door cup holder.
Also a good place to put these: Emergency Information Cards.