I recently came across a new gadget that would be of benefit to ALL travelers.  Hydro-Photon has created the Steripen which purifies water using ultraviolet light.  Divers often travel to areas where bottled water is required.  The Steripen will kill almost all bacteria and viruses and many waterborne microbes.  If you do a lot of traveling, this might be something you want to use.  When I travel to country that I am concerned about the water I will take a Steripen with me.