I'm sure no one on THIS Forum would violate ANY rules or regulations, but have you heard of the success or failures of getting liquor on board Cruise Ships by using the Rum Runners Cruise flasks that are on sale? They are small flexible bags that one would fill with "water", and they are undetectable by the x-ray machine when packed in the luggage.
Our last cruise (Dec 30, 2016 on NCL), they would not allow us to carry on our case of water due to a recent change in NCL rules. So, our next cruise we plan on trying to use the Rum Runner bags to get some "Water" on board.