K.C.
Any snacks are fine, though you might not be allowed to bring produce into another country, so I would avoid packing fresh fruit or veggies. But any packaged type of food is definitely ok.
Drinks are iffy. Milk/formula for kids and babies is always ok. I have also been able to get juice boxes through, saying he needed it to keep his ears from popping. Water is never ok and has to be purchased after you've gone through security.
I always pack TONS of snacks and sometimes even a full dinner for myself (like subway sandwiches and chips) and it's always fine. Have a great trip!
K.
http://www.discoverytoyslink.com/karenchao - Labor Day Sale thru 9/7. Great toys and games for babies and kids of all ages. Many toys travel well for vacations!