I love these bags and take one to work everyday with my lunch and shoes. They are sturdy and light-weight, they stand-up and have lots of storage pockets inside and out (a water bottle fits in easily).  The bags were designed by flight attendants and the large back pocket can be unzipped on the bottom so the bag fits on a suitcase with a pull handle.  I have them in a variety of colors and have given them to my daughters--who regularly request another--and friends.