It's possible, I guess. Water gets heavy pretty quick, though. And you have to worry about it bursting.
I would just order it from staples: http://www.costco.com/Browse/Produc...=0&Ntx=mode+matchallpartial&Nty=1&topnav=&s=1 It costs about $7 per case, including delivery.

We toss empty ones in our suitcase -- not a whole lot of extra space or weight & no worries about getting things wet. If you are not fans of FL h20 -- try the flavored h2o packets.

We packed water when we went to the Bahamas and had no problem at all. Going to Disney though you can use www.gardengrocer.com or Costco or any of the delivery services available for water delivery for a decent cost.
Has anyone ever packed water in their checked luggage. I am trying to avoid a stop at the stor and wanted to pack water in my luggage. Is this possible? I checked SW site, they only talk about alcohol. Anyone ever have any problems doing this?
Beware Disney has just start to charge $10 for the delivery of items to any Disney resort. So if you are planning to have a case of water shipped to Disney factor in an additional $10 that Disney will bill you for holding it/delivering it to your room plus the shipping charge from what ever source you buy if from and you could be looking at $18.00 just in shipping/handling costs for a case of water that cost $7.00. Can't see spending near $25.00 for a case of water !!!!
So now the water will now cost you the same amt as purchasing it from Disney.