Noun: The phrase "how much are soda cards on carnival cruises" refers to the monetary value associated with a soda card, which grants unlimited access to non-alcoholic beverages during a Carnival Cruise vacation.
Soda cards are highly sought-after amenities on Carnival Cruises, offering significant savings over individual drink purchases. They were initially introduced in the early 2000s as a way for passengers to manage their beverage expenses and enhance their onboard experience.