Feeding Baby While Flying Seal the bottle with a screw-on travel cap, and once the cabin is pressurized, you're good to put the parts back in and use the bottle as normal. If you want to warm the contents of the bottle, just ask your flight attendant to warm it up in a cup of hot water.

Bottle feeding a baby on a plane requires preparation for both pressure changes and limited space. The most important tip is to feed your baby during takeoff and landing; the sucking and swallowing action helps equalize the pressure in their ears, preventing the pain that often causes mid-flight crying. TSA (and most international equivalents) allows "reasonable quantities" of breast milk, formula, and purified water for infants, even if they exceed the 3.4oz limit, but you must declare them at security. For convenience, use pre-measured formula dispensers or ready-to-feed liquid bottles to avoid messing with powders in a cramped seat. If you need a bottle warmed, ask a flight attendant for a "cup of hot water" to create a warm bath for the bottle—never ask them to microwave it or put hot water directly in the formula, as it can cause hot spots. Also, consider using a disposable liner system (like Playtex) to minimize the number of bulky bottles you need to clean in the tiny airplane lavatory.