My first Travelon bag was the Travelon Anti-Theft Classic Mini Shoulder Bag, Chocolate and while the bag is a great size for day trips it is lacking a spot for a water bottle and this drove me crazy during a trip to Washington, DC.  My second bag was the Travelon Backpack,Black.  Again I love the size of this day trip backpack.  It has great features and a spot for an umbrella and water bottle.  I am a fairly short person and this bag was not too big for me but I did get hot while carrying it.  Also if you plan on visiting museums you may have to lock up the backpack in a locker.  I just purchased the Travelon Anti-Theft Active Tour Bag and I think I will be the best of both worlds.  It has the space like the backpack but is a crossbody bag so hopefully I will not get over heated while carrying it and I did not have to lock up my crossbody in museums. .  I was also able to fit my CamelBak eddy 20oz Vacuum Insulated Stainless Water Bottle in the pocket with no problems.  I am going to test it out in Las Vegas before taking it on my next overseas trip.