In all of my cruises I have never taken on board the allowed beverages- 12 pack of soda or other non alcoholic bevvy, and bottle of wine. I know you are permitted to do so in your carry on luggage. My question is what is the protocol & etiquette for carry on's? my backpack usually functions as my sole carry on. Will I be permitted to say take a small shopping bag as well to accomodate my beverages??