Formula, breast milk, juice in quantities greater than 3.4 ounces or 100 milliliters are allowed in carry-on baggage and do not need to fit within a quart-sized bag. Remove these items from your carry-on bag to be screened separately from the rest of your belongings. You do not need to travel with your child to bring breast milk. Breast milk and formula are considered medically necessary liquids. This also applies to breast milk pumping equipment (regardless of presence of breast milk).
Ice packs, freezer packs, frozen gel packs and other accessories required to cool formula, breast milk and juice - regardless of the presence of breast milk - are allowed in carry-on. If these accessories are partially frozen or slushy, they are subject to the same screening as described above. You may also bring gel or liquid-filled teethers, canned, jarred and processed baby food in carry-on baggage. These items may be subject to additional screening.
Please see traveling with children for more information.