I will be flying internationally and would like to take some prepackaged non perishable type food in my checked baggage to have for snacks throughout my trip. I was wondering if this will cause any sort of problems with customs and the different countries I will be visiting. The route will be New York-Paris-Malta-Rome-Paris-New York. I will also have a few things in my carry on baggage to eat on the flights - if I still have food left after landing will I be required to throw it out? Thanks in advance for any advice you can give.