I'd add:

PVM (pocket valve mask) for CPR
safety glasses
towels (warmth, bandage, splint, sling, padding voids, etc.)
tourniquet
seat belt cutter/window breaker
diphenhydramine (benadryl) - liquid form
triple antibiotic ointment
irrigation syringe
bottle of saline
large plastic bags or aluminum foil (like someone said earlier,can use to make an occlusive dressing - plastic bags can also be used for biohazard bags and a million other things)
duct tape - can also be used as an improvised occlusive dressing, tourniquet and a million other things.
paper or plastic cups (can be used as shields for eye trauma, etc)
water bottles