No, don't put it in listerine bottles, unless your initially coming on the ship. If your coming back from a port, you need to find a better way. Don't bring it in a water bottle or anything because the security guards arent stupid and are likely to check that. Buy mini-bottles with no metal on them and put them in ur pocket (wear cargos), leave them there and waltz right through te check. There will be no detection and you'll be safer than if you try a bottle of some kind. And my luggage has been inspected (with the little card in it) 4 out of the last 5 cruises. If you put a large listerine bottle full of something in ur suitcase or travel bag, theyre gonna check it. Better bet is to spread it out into several 3oz bottles that are less obvious. Shampoo, Conditioner, face wash, body wash, mouthwash. If the bottle is clear and listerine or something, put a drop of green food color in it just for good measure. Wont affect the mix just make them deff. overlook it.