Like they said, plan to pay about $8 for a martini + 15% gratuity. I like Grey Goose martinis so I pay around $10 per cocktail. Wine packages save you a few dollars if you like bottles of wine with your dinners (yes I do ). They are all posted on the website of RC.
Mariner-05/06 & 10/09
Oasis Inaugural Cruise-12/09
Monarch-03/10 & 07/10
Mariner; RSS- 10/12
Australia; Celebrity Solstice 11/27/2016