I tried a couple different ways, and by far the tried and true method has been using Rum Runners! I tried boiling water bottles and popping the unbroken caps back on, but I just ended up with an exacto knife sticking out of my hand, and a bunch of confiscated liquor.
Most cruise lines allow one bottle of wine or champagne per person of 21 or older. There are ways to remove the cork replace the wine with liquor and then put the cork back without it being at all noticeable. After watching the How-To’s I strongly suggest saving your time and energy and just getting Rum Runners.
Rum Runners are just plastic, collapsible, washable, reusable flasks. They come in different sizes, so I buy a few Big ones and a few little ones, so I can carry the little ones around with me without going back to the room for every drink. PUT THESE IN YOUR CHECKED BAGS AND/OR ON YOUR BODY. DO NOT PUT THEM IN YOUR CARRY ON! Putting them in your pockets is the best way but depending on how much you like your beach drinks, the excess will need to go in your checked bags. These are also refillable when you get off the boat, refill them at an island liquor store and discreetly hide them on your person, voila! refills! These are also great for concerts, festivals, family reunions etc.
The Wine Rack
or Belly Flask
or Saddle Bags
are always viable options, however, a little more ridiculous in my opinion. And by ridiculous, I mean totally awesome, just over priced.
They also make Shampoo/Conditioner/Listerine etc look a like bottles to fill with liquor. Again, in my opinion, rum runners are the least ridiculous, and you can easily take them onto the islands to refill and easily return to the ship with.
Also, most cruises will offer an “open bar” type option (Carnivals is something like $50/day for 15 drinks/day) depending on how many ports your stopping at, this may not make sense. If you are off the boat for 9 hours, its probably not worth your money to pay to drink all day on a ship you won’t be on. Unless one of the ports is Half Moon Cay, which is owned by carnival so you use your Sail & Sign card on the island as well. A good way to get your monies worth on this would be to split it with someone else, the only cons are your drinks are cut in half and someone has to be the beer bitch the whole trip. But if you think that will work for you $50 for 15 drinks a day isn’t bad! But I’ve always stuck with Rum Runners and we have never run out or stayed sober, so I think we’ve had a good approach!