We've all been there and tried to sneak booze into a stadium or concert without getting it confiscated. Some are more successful than others. No idea if this actually works or not, but here's a informative DIY video on how to seal booze in a water bottle to sneak it into a concert or sporting event or whatever. I can't imagine how weird this would look if you used a brown liquor like rum or whiskey.
Update: The guy who made this video, Brad, wrote in to explain a little more. Thanks for the comment and kick-ass video, Brad!
This is my video, let me give you an update. It worked for my group on our cruise. Carnival allows you to take 12 bottles or cans of water or sodas as long as they are 20oz or less. There was 8 of us, we each brought on 4 bottles of liquor, 4 bottles of water and 4 redbulls or sodas. Also we brought in Captain Morgan with Iced Tea bottles and the coloring was spot on. Thanks for posting the video!