So if you're trying to sneak alcohol onto a cruise in a water bottle you'll need to remove the cap without breaking the seal. To do this you'll need some boiling water, a bowl, pliers, scissors, and a knife.
Once you've got your sealed top off your cut up bottle empty another bottle of the same size like normal (by drinking it or dumping it out) and cut the existing quality ring off. Fill the bottle with your clear liquor of choice and screw on the sealed top.
This was a real impromptu video that I made in the middle of the night. I know I left out some steps for finishing up the job, but hopefully common sense will guide you the rest of the way.
