Hi, here is an article with useful information on milk storage:
http://www.lalecheleague.org/faq/milkstorage.html
According to the article:
i) there is no research that indicates how long warmed milk can be kept at room temperature for.
I know most of my friends would only let their children drink the milk if it is within 1 or 2 hours (and if it still smells and tastes ok).
ii) expressed milk can be kept in the normal fridge for up to 8 days.
iii) from what i've read, it is best not to refreeze warmed milk and most of my friends do not put warmed milk back into the fridge even if their children have not consumed any of it.
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