Boxed-wine or any liquid, runs the risk of ruining everything in your suitcase along with others under yours. Imagine, being the suitcase under someone else's who leaked due to pressure on flight. ..
I pack dry snacks, cereal, fruit snacks, granola, cracker jacks, twizzlers, goldfish, goldfish, and more goldfish.
For bottled water, pop, Wine not priced direct from Disney ect.. You could do a 1 day rental car and drive to the store. You can pick it up at the airport and drop off everything at your room, then drop the car off at the Disney World rental car location. (They will drive you back to hotel.) About 1/2 doz different rental car companies. Enterprise doesn't charge the 50$ drop off fee for diff location, when starting at an airport and ending not at an airport. Other might too.. I don't know. It will run you a 1 day rental car fee, but you will get out of 1 ME trip, and trip to the store, and even dinner off site if you wanted.)