We're going to be flying long-haul very soon, and I'm planning to take some expressed milk for my 9 month old. I have never given him expressed milk before. I have read that there is no need to sterilise feeding equipment once they're older than 6 months, but does this still apply if I'm going to be storing and transporting the milk? Should I sterilise the containers I use to store and refrigerate it, for example? And what's the best way to keep it cold in my hand luggage (I'm assuming it's important to keep it cold)?