What are some strange SFW objects that can fit in the handle of a car door?
My one friend and I have been leaving odd gifts on my friend's car with notes like "I think this fell out of your car" nothing of value. Nothing that can damage the vehicle.
They do make little 1-serving packets of PB, kind of like the ones for BBQ sauce or honey mustard. Sometimes you can find them at hotel continental breakfasts.