They also do (on Deck) Buckets of Beer, buy 6 cans, pay for 5, in a bucket of ice.

The details can be seen on Carnivals website: To purchase a drink package, visit any one of the onboard bars and lounges and the package will be charged to your SeaPass account. After you've purchased a drink package, a sticker will be placed on your SeaPass Card to show which package you've selected. Then all you have to do is show your SeaPass Card as you normally would when ordering a drink. Where You'll Find It Drink packages are offered on every ship in our fleet. Adults' Beverage Programs Wine and Dine Package: Enjoy one bottle per night at dinner from a select list of red, white, blush and sparkling wines. Package price includes one bottle per night; please ask for specific pricing information onboard.A 15% gratuity will automatically be added to the price of each package. Adults' Fountain Soda / Juice Package: This package entitles guests 18 years of age and older to unlimited consumption of fountain sodas (no cans) and juices at all bars and lounges, Windjammer, Main Dining Room and Private Destinations (CocoCay and Labadee®). This package is available for purchase on the day of embarkation at all bars and lounges and may be charged to your SeaPass account. After this package has been purchased, a sticker will be placed on your boarding card allowing you to consume fountain sodas (no cans) and juices throughout your cruise. A complimentary Coca Cola souvenir cup is included as part of the package. Juices that are included in this package are orange juice, grapefruit juice, pineapple juice and cranberry juice. Please note that juices are always complimentary at Breakfast. The cost of the package is $6.00 per person, per day, and is applicable to the total days of the cruise vacation. A 15% gratuity charge will be added. Please note: The fountain soda and juice package is only available for the total amount of days of the cruise and prices are subject to change without notice. Kids' Fountain Soda / Juice Package This package entitles our younger cruisers (guests 17 years of age and younger) to unlimited consumption of fountain sodas (no cans) and juices at all bars and lounges, Windjammer, Main Dining Room and Private Destinations (CocoCay and Labadee®). This package is available for purchase on the day of to your SeaPass account. After this package has been purchased, a sticker will be placed on embarkation at all bars and lounges and Adventure Ocean and may be charged your boarding card allowing you to consume fountain sodas (no cans) and juices throughout your cruise. A complimentary Coca Cola souvenir cup is included as part of the package. Juices that are included in this package are orange juice, grapefruit juice, pineapple juice and cranberry juice. Please note that juices are always complimentary at Breakfast. The cost of the package is $4.00 per person, per day, and is applicable to the total days of the cruise vacation. A 15% gratuity charge will be added.