Cruise ships have a list of items that are not allowed on board for safety and security reasons. Some of these items may seem obvious, such as fireworks, but others may surprise you. Here is a list of items that you should not bring on a cruise ship: -Fireworks -Weapons or ammunition of any kind -Illegal drugs -Candles or incense -Laser pointers -Pets (with the exception of service animals) -Outside food or drink (except for infant formula/food) -Hammocks