What should a teen carry in her purse while traveling?

This summer my family is vacationing in Paris, and I need to know what to put in it, travel specific. I already have the basics like sungles, wallet, lotion, nail stuff, etc. Anything else? Oh, and my purse is pretty big, here's what it looks like: http://www.google.com/imgres?imgurl=http://www.kaboodle.com/hi/img/c/0/0/138/5/AAAADMM-JYYAAAAAAThcSA.jpg&imgrefurl=http://www.kaboodle.com/reviews/candies-maisy-bow-striped-cross-body-handbag&usg=__RSyF2txTK8My_mMslHz3VGirnbs=&h=150&w=150&sz=10&hl=en&start=12&sig2=O1JdTtzXa8F1aeaob2GUQw&zoom=1&tbnid=rhaTTYjrMI-EPM:&tbnh=110&tbnw=110&ei=2EvoTZnuO4LVgQevub1_&prev=/search%3Fq%3Dkohls%2Bcandies%2Bfloral%2Bpurse%26hl%3Den%26biw%3D1059%26bih%3D409%26gbv%3D2%26tbm%3Disch&itbs=1&iact=rc&dur=125&page=2&ndsp=15&ved=1t:429,r:11,s:12&tx=70&ty=39 except it is blue. I don't wear makeup or have a cell phone.