The only prepaid drinks card is the soda card. This costs $4.60 pd for children and $6.90pd for adults. The card is bought on board.
A 15% gratuity is additional. A complimentary Coca Cola Souvenir Can is included as part of the program. The fountain soda package is only available for the total amount of days of the cruise.
You can also purchase a wine package once onboard-very good value-7 bottles of decent wine from a good choice for about £9.