We have the travel size charmin toilet paper, toilet wipes, and hand wipes in the glove box. 'Cause yes, a situation may just arise.
I also keep a stash of tampons in the glove box just in case. Ever since I started doing, I've never been in a situation where I needed them. So I consider it good luck.
Purell hand sanitizer.
An easel carrying case that I have to get around to returning.
Car carpet cleaner in the trunk.
A first aid kit in the passenger seat's net.
An extra hairbrush.
Cell phone adapters.
And an emergency battery charger.