I don't know how the case corkage fee works but I do know a box of wine has a $30 corkage fee. The corkage is only a fee giving you permission to bring aboard. I believe you may be aloud to bring a special bottle of wine or champagne but must check it in at the embarkation process. There is no fee available on liquor and they do not allow any in the staterooms. This is also the case if you purchase liquor aboard in their shop. If you purchase their liquor, you will receive that the night before disembarkation. You are forced to purchase their mixed drinks averaging $8-$12 per cocktail.