As soon as you board the ship your assigned key card or wristband becomes your digital wallet. Whether you’re paying for a drink or meal that isn’t included in your package, everything goes on your card or wristband and is charged back to the credit card on file at the end of your trip. So, save all the cash you’ve converted for when you’re on land and if you’re travelling internationally make sure that the credit card you have on file won’t incur any additional fees.
It’s a cashless economy