When I take any road trips with my husband and kids, I usually have a bag or purse right with me that contains my wallet, lip balm, Advil, a book or magazine, bottle of water, phone, sunglasses and house/car key ring. This is me packing light BTW.
It sits on the floor in front of me (as a passenger) and I would be very unlikely to leave home without any of these things.
Wouldn't it be great if we knew what, (if anything), was on the passenger side of the car...assuming he did the driving since she evidently liked to take 'travellers' with her when they got out of the vehicle to stretch their legs?
JMO