Most of the drinks are the same price as if you went to a nice bar. You can get a "deal" on a bucket of beers. Four for $15.
Life is too short to let the ship of your dreams sail without you.
Carnival Destiny Feb. 2006
Carnival Fascination Feb. 2007
Royal Caribbean Grandeur of the Seas Feb. 2008 The DTW & MsBJ tour
Carnival Valor MsBJ and Dina Feb. 2009
Carnival Glory MsBJ and Dina Feb. 2010
Carnival Dream MsBJ and Dina Feb. 2011
The cost of mixed drinks vary by cruiseline, but they are all in the same ballpark. For example, we had an afterdinner drink on RCCL in 2005, and it was $8 (plus gratuity).
A drink on CAL last fall was $5.50 (plus gratuity). That was, however, the drink of the day in a regular glass, and the RCCL was in a keepsake glass.
Each ship has drinks of the day, and some have drinks of the day and martinis of the day and such. Prices for those are usually a little less. And, like I said, we got the drink in just a regular glass the second time. If we had gotten the commemorative glass, it would have cost about $2 more.
Hope this helps!
CCL Tropicale - '95
RCCL Adventure of the Seas - '05
CCL Valor - '06
CCL Victory - '06