You are allowed to bring wine and champane on board for in cabin consumptionin your carry on bag.Any thing else is not "allowed " but aparently the policy is enforced very sporadically, so you may be lucky. As far as whats in your luggage , seems that's not a problem, just make sure it's in non breakable containers.
There are two seperate camps on this whole issue. The" how could you cheat and break the rules, and are you cheap?" group, and then there's the " the booze is over priced, I'm saving more money for shore excursions and bingo, and I like a drink in my cabin without paying an arm and a leg group" .
Personally we like a Baileys on the balcony before dinner, and it's not even offered on the room service menu, so what are we to do??(wink wink)