how long can I keep expressed BM for after warming up

No kidding of BM or EBM with different temp. After warmed up BM , need consume less than 1 hour. That's what I did to my LO. If EBM I will only keep it up to 2 hours then let Lo to consume. Anything longer than that I will just discard

If baby’s drunk from it, probably about 1-2 hrs (but still smell it before feeding). Wouldn’t mix it with the next batch

If Warm up already, you can't mix and keep for next feed. If the milk is you pour half out, not warm up before, you can mix.

No. Dont mix. If tou keep in the fridge and warm up suggest the most keep 1hr. If he cant finish throw it away

You can keep in the fridge for the next feed, only re-warm once. No mixing

Suggest not to mix. Do discard if left outside in hot weather

better not mix