A bag for any blow outs and I have diaper cream and a burp cloth in mine as well
An extra shirt for you in case of a blowout or spit up session.
Hand sanitizer
I keep a first aid kit in mine
I keep a kit with a thermometer, booger sucker, and nail clippers in mine. I also have some rattles and teething toys. And I have tampons in mine because I quit caring my purse around lol
A wet bag just in case of a blow our major spit up.