You can bring frozen drinks through airport security
According to TSA regulations, liquids that are “frozen to a solid” when they are presented for screening can be brought through security. “
Items that are “partially melted, slushy or have any liquid at the bottom of the container” must meet the standard 3-1-1 liquids requirements.
An exception to this rule is breast milk, which is allowed in carry-on baggage in quantities greater than 3.4 ounces. The TSA allows milk, formula, and pumped breastmilk through security without any limits, because they treat them as “medically essential liquids”. The TSA allows formula, breast milk and toddler drinks, as well as baby/toddler foods (including puree pouches), in quantities exceeding 3.4 ounces, or 100 milliliters, in carry-on luggage. The same applies to formula and breast milk cooling accessories such as icepacks, gel packs, and freezer packs (regardless if breast milk is present). You do not have to travel with your child to bring formula, breast milk or related supplies. “
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Regarding how much you can bring, the TSA specifies “reasonable quantities.” Summer Hull, director of content for TPG, says that the officer has some discretion. The TSA will stop allowing other liquids, including drinks for children, to be brought through security at that time. To avoid any liquid for your child getting tossed, she suggests the frozen method as a workaround.
“While the TSA rules permit frozen liquids going through security, and I can vouch that it does usually work in practice, some TSA agents simply interpret things differently from most, so be prepared with the rules if you don’t want to toss your drink,” she said. I wouldn’t also
12 different frozen drinks, unless you want to be subjected to secondary screening. “
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