Formula, breast milk, toddler drinks, and baby/toddler food (to include puree pouches) 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.
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You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes in your carry-on bag and through the checkpoint. These are limited to travel-sized containers that are 3.4 ounces (100 milliliters) or less per item.
Water for babies is allowed in reasonable quantities in carry-on bags. Remove this item from your carry-on bag to be screened separately from the rest of your belongings. Please see traveling with children for more information.
You can bring an empty reusable water bottle through TSA security. Read: It has to be empty. After your items and carry-on bag have gone through security, you can fill up your water bottle at a nearby refilling station. If you bring your full water bottle to the security checkpoint, it's not a big deal.
Pack enough cartons for the whole journey and for any possible delays. Carry the sterilised bottles in a sterilised, lidded container. You can give your baby ready-made formula at room temperature, or you can warm the milk if your baby likes it like this. To do this, you could use a travel bottle warmer.
Airlines allow baby food, formula, and breast milk in a carry-on bag, but the TSA has a 3-1-1 rule for liquids, including all baby food items. Each passenger is allowed 3.4 ounces or less of liquid, gel, or aerosol products per container, and all containers must fit in one clear, quart-size bag per person.
You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item.