My pediatrician told me to collect packets of sugar before our trip and mix a couple packs with a cup (or bottle) of water. Infants and toddlers usually won't drink unless they're thirsty, but when they taste the sugar water, they won't turn that down. At least that's what my pediatrician told me. On my oldest son's first 2 trips, I had a huge ziploc full of sugar packets, and he barely touched the sugar water. At 11 months for his first trip and 2 for his second, he was more into candy. We brought caramel with, and kept feeding him tiny pieces of the caramel. It kept him chewing for the entire take-off and landing, and we only went through maybe 3 pieces of caramel. Now I skip the sugar packets and just make sure I have lots of chewy candy (skittles, caramel, fruit snacks, etc.). I like the caramel best, because a little can go a long way without loading them up too much with sugar. My youngest was 3 months for his 1st flight, so I just made sure he was either nursing or taking a bottle during take-off and landing. It was a 3 hour flight, so it worked out well that it was feeding time during both. I did have sugar water with on that flight just in case, but didn't end up needing it.