Transporting frozen breastmilk

[graysongirl]

My DS (who will then be 4 months old) is going for his first overnight stay at his aunties who lives approx 2 hours away. I have been expressing and storing BM in preparation but how to safely get it there? We will be driving over on the Sat morning so milk will be used that day and night, DS returing home on the Sun afternoon. Should I defrost at home 24 hours before and transport in cool bag or let it defrost on way in or out of cool bag...??? He does have formula at his 10pm feed so his auntie could give him formula but don't really want him to have no BM for 24 hours but would rather do that than risk breastmilk going off. Help!

Breast Milk expressed will keep up to 3 days in the back of the fridge, you can express milk for the first day the day before and keep in fridge, transport with an icepack (encased if you like) one pack at bottom, on sides, top etc. Frozen will defrost fine overnight in fridge and I would transport it frozen and put it straight into fridge. It will not go off. Unless there is a power failure etc. and if all else fails he will survive on Formula. I flew 12 hours with frozen breast milk when ds was 5 weeks old, I had a thing about breastfeeding in public, let alone on a plane, and did not want to express in the toilets.