I took my baby to LA when he was 6mos old to visit grandparents. I bring 奶樽(有水) and 熱水壺(有熱水). But both HK and US airport don't allow me to bring any water except milk into aircraft. They make me pour out all the water. So I have not choice but to ask 機上空姐 to fill up my 熱水壺 and mix warm water for me. 機上空姐 are very nice and helpful. 我係坐國泰. When you make booking for your flight, remember to ask for baby meals (jar foods) and diapers.