What are cruise dollars?

[firsttimecruizer111]

Can someone tell me what cruise dollars are? What would be the point in purchasing them and adding them to the S&S rather than just adding a credit card or cash? Can you buy them at a cheaper price? Where are they bought?

[Megan_Strick]

I just bought someone and got them in the other day. I am trying to buy about $25 a week. Some people say put it in an account and earn interest but this way I am sure to have the money and not spend it before hand. You can buy them on the carnival site. Just seach fun ship dollards