If you look underage, cruise ships will check your ID when you ask for a drink.
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Drinking Alcoholic Beverages / Tobacco ProductsGuests must be 21 years of age or older to be served alcohol on board. Proper I.D with birth date is required. In keeping with U.S. federal law, the age for the sale of tobacco products is 21. This policy is for U.S.-based itineraries/ships only.
Travelers under the age of 18 must travel with an adult over the age of 18. Children under the age of 16 must have a passenger who is 16 or older share their cabin. Minimum age to leave a P&O ship on your own: Guests must be 17 or older to go on a ship-sponsored shore excursion on their own.
On all Carnival Cruise Line ships, passengers must be 21 years of age or older to be served alcohol on board, even in international waters. Carnival Cruise Line is one of the only cruise lines that does not allow drinking under the age of 21 under any circumstance.
ALCOHOL POLICYThe minimum age to consume alcohol on Royal Caribbean ships on sailings originating in North America or the Caribbean is twenty-one (21). The minimum age to consume alcohol on Royal Caribbean ships on sailings originating in South America, Europe, Asia, Australia and New Zealand is eighteen (18).
Carnival requires that all passengers in a cabin are 21 or older or that at least one person in the cabin is 25 or older. An exception may be made for underage married couples, as long as they are both 18. These couples may be asked to show proof of their marriage.
Times Your Child Does Not Need a Passport to CruiseChildren younger than 16 need only to carry their birth certificates (original or copy); children 16 and older, as well as adults, each need to show both a birth certificate and a government-issued photo I.D.
Cruise ship security involves walking through a metal detector to ensure that you have no prohibited items on your person and having your bags scanned through an X-ray to ensure that you aren't bringing prohibited items such as irons or alcohol aboard.
Guests under the age of 21 must be accompanied by a parent or guardian. On selected seasonal departures, Guests 21 to 24 years old must have one person at least 25 years old in the same stateroom, who shall be responsible for the under-age 25 Guest.
Kids Cruise Free Offer: Guests ages 18 and under (“children”) are eligible to travel free (Taxes, Fees & Port Expenses are additional) when booked as a 3rd and/or 4th guest on select cruises. Limit up to two free children per eligible booking. Offer excludes Alaska cruisetours; other exclusions may apply.
Passengers ages 18 to 20, with the written consent of their parents or guardian, can purchase beer or wine for themselves only when the ship is sailing in international waters (except in Alaska and Hawaii, where you must be 21 years of age to consume or purchase alcohol or any kind).
Carnival Cruise Line: Carnival has one of the loosest beverage policies of all cruise lines, allowing each guest to carry on a maximum of 12 sealed 12 oz.cans or cartons of a non-alcoholic beverage (e.g., sodas, juices, milk, or sparkling water) – a policy that most cruise lines have eliminated.
However, if a guest celebrates their 21st birthday during the cruise, the guest may thereafter ask the Guest Services Manager to modify ship's records to permit their consumption of alcohol during the remainder of the cruise.
Though Royal Caribbean doesn't explicitly define a fleetwide set curfew time in its guest policy, it leaves curfews to the discretion of the ship's Captain and underscores that parents and guardians are responsible for the behavior and appropriate supervision of their accompanying minor(s) and young adult(s) ...
The minimum age to consume alcohol on Royal Caribbean International ships on sailings from South America, Europe, Asia, Australia and New Zealand is eighteen (18). The minimum age to consume alcohol at all private destinations remains twenty-one (21) without regard to where the sailing originated.