here are a few things a teenage girl should keep in her purse
 
1). every girl should keep a makeup bag in their purse (if they wear makeup)
it should contain:
~eye liner (liquid, gel, pencil, pen)
~mascara
~foundation
~powder
~hand sanitizer
~chap stick
~wipes to keep your face from being oily
~any other makeup product you want
 
2). most girls have their period in their teen years so i recommend keeping pads or tampons in you'r purse and maybe and extra pair of underwear just in case.
 
3). keep a notebook/journal and pen you never know when you may need it .
 
4). a good book such as the perks of being a wallflower (and reading glasses if you need them like i do)
 
5). Gum it keeps you'r breath fresh!
 
6). lotion or perfume to smell nice :3 i love lost in fantasy from victorias secret