I got this off Trip Advisor, hope it helps:
"I just took a 4 day RCCL cruise. There are 3 wine packages. All alcohol has a mandatory tip of 15% which I have included in all prices. For 5 bottles the price is: Gold 129.95, Platinum 143.75and Diamond 157.55. ( I have seen a posting on Cruise Critic that RCCL has just changed their wine packages and increased the price.) i picked the Platinum as it had more reds. I was able to pick up a bottle at lunch in the dining room. By my calculation if you drank 5 bottles of Mondavi @ $36.80 X 5 = $184 versus the $143.75 I paid. 22% less. There were more expensive bottles and less expensive bottles so you should pay attention to the prices when you select your bottle at dinner. Prior to the cruise I took the wine list and looked up prices for what I could buy a bottle on-line then tried the most expensive ones to try on the ship.
A 16 oz budweiser is $5.69. A glass of wine is $7.47. The drink of the day is $9.49."