thats a pretty good idea. hah fun story... on my last cruise me and my friend were at port but the only alcohol they had was a tequila store. so we bought a big bottle and put it in a huge water bottle but of course it looked yellow. well he was wearing a baggy shirt and semi-tight pants so he stuck it in his waist band and got on no problem. it did look like he had an abnormally large bulge, but that is not the security guards business.