If your baby drinks formula or is onto eating solids, Beaba's Stackable Formula and Snack Container ($12) is a great way to stash extra supplies on the go. You can load up between one to three of the small containers and stack them for a compact food supply for your little one.
Tip: Even if you're planning on a two-hour flight, factor in the potential for delays at the airport or on the runway, and bring more than you think you'll need.