Is there anything available at the gift shop aside from wine in the store at Kidani. ...more particularly vodka? I know I know. .. this is for the MIL though not me!
We have used something similar to this called the wine diaper to transport some of our own (better) wine for WDW and DCL trips. We have yet to have a bottle arrive damaged, but if it did, it would not be a problem with these things. I have actually seen them in the store at Bed, Bath, and Beyond, so you could even check there is you have a store in your area.
No kidding. The price of liquor in the resorts almost floored me. We drive so we pick up beer at Target on 192 (still expensive). We've never bought liquor while there other than in a drink but I have to believe that it's quite literally a good 75% cheaper out on 192 just from glancing at the prices.
Captive audience kinda thing. You hear that a lot at WDW. Don't worry. The ride from the airport to the resort is free.