Normal
there are different opinions (and tricks) for smuggling alcohol on carnival cruises, but according to the Carnival alcohol policy your smuggled bottle(s)/cans will be confiscated until the last cruise day when they will return all of them to you - remember bottles/cans must have been sealed and also in original manufacturer containers. You're still allowed to bring 12 bottles or cans of soft drinks (each 20oz or smaller, must be sealed) in the carry on baggage. You also can bring 1 bottle of wine or champagne - 750 ml and it's per passenger (21 or older).