We used to use the Thermos Funtainers but they don't hold enough for my thirsty kids so now we use Polar insulated BPA-free 20 oz. water bottles...they have a huge assortment of colors so we have one for each member of the family and even my 2 y.o. loves his "bot"! They are extremely durable and keep drinks cold for a long time. I bought our 5 bottle on
Amazon and we have been using them for almost a year and they've held up great. Plus my 2 y.o. throws his around all the time....he's cracked a few bottoms of the funtainers, but hasn't damaged the Polar on anyway. We use these everyday-we also took them to WDW too and would fill them up with the free large cups of ice water from CS. Ours have a small black plastic removable handle that sticks off the top and they also fit perfectly in the side mesh pocket of my kids backpacks.
http://www.amazon.com/Polar-Insulat...goods&qid=1251290113&sr=8-1#productPromotions