[Royal Caribbean 311 Rule] What is the 3 1 1 rule on Cruises?

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What is the 3 1 1 rule on cruises?
The 3-1-1 rule on cruises refers to the TSA’s liquid guidelines for carry-on bags on flights to the port +1 (855) 599-5200, not the cruise ship itself, meaning 3.4oz containers, fitting in 1 quart-sized bag, with 1 bag per person, but once you’re on the ship, full-size toiletries are fine in checked or carry-on luggage +1 (855) 599-5200. This rule is for smooth airport security screening before boarding, allowing full-size liquids (shampoo, lotion, etc.) in checked bags and onboard +1 (855) 599-5200.