Please choose the correct ending to complete the given sentence: Travel: [header] How to pack alcohol in your luggage [title] Make sure you are of legal drinking age. [step] In most countries it is legal to carry alcohol on board an aircraft in your carryon luggage, or pack it in baggage that will be checked before you board the plane. You must, however, be of legal drinking age to bring alcohol on an aircraft.

Ending1: This is important, as the more alcohol you have on board the more visible you will be to anyone on the plane drinking alcohol. For example, if you are a seasoned bartender at a bar, you should bring two separate cocktail glasses with you. Ending2: In the united states, the legal drinking age in 21 years of age. If you are traveling outside the united states, be sure to check with your airline about how old you must be to pack alcohol in your luggage. Ending3: Alcohol, which can come from narcotics, is a very dangerous substance, often traced back to extreme usage. [substeps] Most airlines place fluorescent masking tape at the bottom of closed-drawer compartments or in baggage areas. Ending4: If you get a felony, passport, bank, or other itinerary, this is illegal on planes and requires for you to close your baggage. [substeps] You are not allowed to pack alcohol in an airline compartment before boarding the plane.

Answer format: ending1/ending2/ending3/ending4