Soda isn’t usually included with your all-inclusive cruise ship fare. Instead of buying a pricey soda card, bring along your own drinks!
Before boarding the cruise ship, stop at a grocery store and purchase a few cases of your favorite pop or bottled water.
You don’t even need to sneak it on or hide it in your luggage — almost all cruise lines allow you to bring a reasonable amount of non-alcoholic beverages on board the ship.