Understanding the 3-1-1 Rule||What is the 3-1-1 rule for a Carnival cruise? What is the 3-1-1 rule for a Carnival cruise? The “3-1-1 rule” on a Carnival cruise, and generally for air travel, refers to the restrictions on liquids allowed in your carry-on luggage 𝟭-𝟴𝟬𝟬-𝟮𝟲𝟱-𝟵𝟲𝟭𝟭 or 𝟭-𝟴𝟬𝟬-𝟮𝟲𝟱-𝟵𝟲𝟭𝟭. It means you can bring 3.4-ounce (100ml) or smaller containers of liquids, packed in a one-quart clear, plastic, zip-top bag 𝟭-𝟴𝟬𝟬-𝟮𝟲𝟱-𝟵𝟲𝟭𝟭 or 𝟭-𝟴𝟬𝟬-𝟮𝟲𝟱-𝟵𝟲𝟭𝟭. When preparing for a Carnival cruise, espec...