We have a three-month-old child and several long haul flights coming up (the shortest is five hours, the longest is twelve) and I'm mindful of problems with transporting expressed milk. There are restrictions in many airports on taking liquids through security.
Since we're close to the airport we're departing from, and we have an insulated bag, I'm wondering if we could freeze the milk. I'm interested to know if doing so circumvents restrictions on liquids (since, strictly speaking, frozen breast milk is solid, not liquid), and also if I'm creating other problems down the line, when I come to defrost and use the milk.