Storing expressed breast milk

You may store it in breastmilk storage bottles (glass/BPA-free plastic) or breastmilk storage bags. You can either chill it at the back of the fridge or freeze it if you don't intend to use it within the next 3 days. Before using the expressed milk, do give it a sniff to make sure it hasn't gone bad. It should not have a sour smell. It might have a fishy smell, but that's normal. http://ph.theasianparent.com/rules-of-breastmilk-storage/