We always take our own insulated water bottles. they are only a couple of dollars each at the stores. this year we bought new ones for a few dollars at a souviner shop just outside of disney a little ways from DTD. They have adjustable shoulder straps and we almost forget we are carrying them. Saves alot of $$ to just drink the water & ice we brought in the parks with us. We drive so we always bring our cooler on wheels and bottled water. just get ice from the resort and we are all set. also souveniers are alot cheaper outside of disney.
You can get a small free glass of ice water from any of the carts that sells drinks.