Soap. I can only use one kind of soap as I'm allergic to all others.
I also have:
a pair of fold up scissors
small sewing kit with needle, several colors of thread and a button
tweezers
hair pick
purse hanger. A hook that hangs off a table so I do have to put my purse on some nasty floor.
a watch. It clips on to my purse since I don't wear a watch (allergic to metals)