Ive seen conflicting information about bringing non alc drinks on RCCL ships. The website says no beverages of any kind which I am to assume means water also. I have seen other reports that specify alcohol only. Its unclear because RCCL doesnt really want any drinks brought on so they can make the money selling them. I think Mike is probably right though. Not sure however if you can bring them in your carry on. Mike do you know?
2008-Valor and Glory
2009-Spirit and Splendor
2010-Freedom of the Seas and Mariner of the Seas
2012-Allure of the Seas and Navigator of the Seas