Yes, you can take baby puree on a plane, and it is one of the few items exempt from the standard 3-1-1 liquids rule. The TSA and international security agencies recognize that baby food, formula, breast milk, and purees are "medically necessary liquids." This means you can carry containers larger than 3.4 ounces (100ml) in your carry-on bag. However, you must declare these items at the security checkpoint. The officers may ask you to remove the purees from your bag for separate X-ray screening, and they might perform an additional "swab" test on the exterior of the containers or ask you to open them for a vapor test. To make the process smoother, it is recommended to keep all baby food in a clear, separate pouch and to use "pouches" rather than glass jars if possible. You do not need to be traveling with the child to carry breast milk, but for purees, the child is usually expected to be present. In 2026, most major airlines also carry a small "emergency" supply of baby food, but it is always best to bring your own familiar brands to ensure your baby is comfortable during the flight.