If it fits in your carry on for the boat you should be fine. I have taken full size wine bottles in my carry on for the boat. I am guessing that you are checking a bag?
Here is the information from DCL
Please be advised: Disney Cruise Line reserves the right to remove fragile items (including beverages) from checked luggage. In such cases, any alcohol will be discarded with no remuneration offered. Beverage containers are considered fragile and have previously caused damage in checked luggage. All fragile items must be transported inside carry-on luggage.
Guests may take non-perishable, government approved snack food items in their sealed, original packaging off the ship in the different ports of call, as well as when disembarking at the end of their cruise. Open bags or containers of snack items may not be taken off the ship or brought back onboard. Guests must either consume or throw away open snack food items before re-boarding the ship in any port of call.
Pam
