We were at ASMu 2 weeks ago...
I had ordered 2 cases of water from Costco 7 days prior to arrival..
When we got to our room, I sent hubby down to luggage services to get them.. they said that they would send them up...we went to MK, and when we returned for the night, the cases were in our room waiting for us!
There was never a charge from the resort...
total for 2 cases was I think $15 with taxes and surcharges..
I cannot for the life of me remember the name of the water...was not Poland Spring, but it was fine nonetheless..
We used both cases during the coarse of our stay (8 days, 2 adults, 3 kids) and the single serving crystal light packets were useful.