Bumped breast milk can typically be left out for a few hours, but this depends on what it’s stored in and whether it’s left over from a previous feeding. Women who pump or hand-express milk for their ...

Most research suggests that as long as it’s been stored properly, unopened milk generally stays good for 5–7 days past its listed date, while opened milk lasts at least 2–3 days past this date.

Milk can stay safe to consume for several days past the expiration date. Expiration dates relate to quality rather than safety. The smell and appearance of milk are clear indicators if it is bad.