I got back last night from a 4-day school trip. I successfully transported about 55oz of milk for DD! I really appreciate everyone's advice about safely storing/cooling the milk and smoothly getting through airport security! It's good to be home.
Well, I definitely underestimated what 3 1/2 days of milk would look like! I kept the milk in Lasinoh storage bags in the fridge until I was ready to leave. Then I put half of them in my small cooler with an icepack and half in a gallon ziplock with an icepack. It was under 8 hours from there to home, so I didn't feel like I had to be too paranoid about temperature. Security was only a minor hassle. The only bad point was that one of the bags leaked a little. Not sure if it was a bag issue or me not sealing it properly. All in all it was a successful trip!
Re: Thanks for all your wonderful advice about flying with milk!