Is there any where online that I can buy one of the mugs that's refillable in the parks? Apparently it's only available if you book a vacation through AAA, but with all the soda I go through when I'm in DLR, I think this will be a great way to save a little bit of money. (A couple runs through hot water can't hurt, right?) New would be preferred obviously, though not to be gross, I'd still be willing to buy a used one. Does anyone know where I can find one? Thanks in advance!