A: How can I find out what I can carry in my luggage on an airline flight? B: You have to think about Customs regulations and airline regulations. A: What is the best place to get information about the Customs regulations for a country? B: It is easier to go online, but if you can't do that, you can write the Customs Office for the country you are interested in. A: What is the most important thing I should keep in mind as far as Customs is concerned? B: Always be honest in declaring everything you are carrying. Otherwise, you can be fined for not declaring everything. A: How do you find out what you can carry in your luggage for a particular airline? B: You can always call the airline you are flying, and they can give you specific information. A: Can I at least bring my own bottled water with me? B: You can't bring your own water. You must buy it at the airport.