I knocked a whole 120ml over the other day. I cried and cried. And my DH managed to freeze two batches of 400ml, which meant 600 was wasted right off... just for the record though, it's frozen milk you have to bin right after defrosting? My son can't breastfeed well and as a result gets almost all his feeds via a pump - so I was hugely cheered to get told that breastmilk is so antibacterial the guidelines go:
Milk can be left at room temp. for 6 hours before binning
Milk can be left 4 hours before refrigerating, after whch normal guidelines apply
Milk can be safely kept in the fridge for 5 days, after which you're fine to freeze it
Milk can be kept in the freezer for 4 months, but must be used immediately after being defrosted
Fresh milk or refrigerated milk can be heated up twice before it needs to be binned
Some nights we feed a fresh bottle, he has 50ml, then we just reheat - still in bed, warmer next to bed - till he's finished the second. It's bliss. I used to have to throw so much away, it was horrible. Especially the week when I began pumping, and supply didn't meet demand, so any he wasted meant the next bottle was formula. And for three weeks after he was off formula he threw up entire feeds in one go. It was hell.