Milk remaining in the bottle that has been offered to baby
Action: Use for next feeding, otherwise discard
Why?: Bacteria from the baby's mouth may have entered the milk during the feeding. This may lead to bacterial contamination if it sets too long (though as yet there is no research available).
Milk that has been thawed
Action : Save in the refrigerator for 24 hours after thawing, then discard. Do not refreeze.
Why?: Milk that has been frozen has lost some of the immune properties that inhibit bacterial growth in fresh refrigerated milk
Milk that has been kept in the refrigerator for eight days
Action : Transfer to storage in the freezer, or discard.
Why?: Bacterial growth is not a problem, but milk sometimes picks up odors or flavors from the refrigerator or the container