I just was checking for my cruise and this is the price I see:
Frozen Drinks Package
Pay one price for an unlimited variety of frozen margaritas, daiquiris, pina coladas and frozen drink specials available at all bars throughout your ship.
*Starting from: 220.00 USD Per Package
Maybe it depends on the cruise, this one is 10 nights. I will say that I had 1 frozen drink on NCL and it was yummy but it also was $10, that could add up pretty fast on a 10 day cruise. Anyway it is some options. With my spouse not drinking and Celebrity letting you take 2 bottles onboard and CC Class giving you a bottle of Champagne, it works out for me I guess. I could get myself in trouble with all those frozen drinks