In lieu of bottled water...
I saw these today and immediately thought that they would be GREAT to have for travel and vacationing! They are available through www.waterbottle.bz for $10 each. A bit high, yes, but think about the possibilities! You can take it (empty) into the airport and then fill it at a water fountain to avoid buying drinks in the terminal. You can use it at Couples to have water on the beach. You can use it at a movie theater or sporting event that don't allow you to bring drinks in.
If you see this message early, you can catch a deal on this item through SaveMore. It ends today, but you can get one for $5 or four for $14 with free shipping! Here is a direct link: http://svmr.co/
I just got mine and hope I get it in time to use for our trip on 10/10!