Many mothers find it convenient or even necessary to collect their breastmilk and store it to be used at a later time. Such is the case for mothers who are returning to work or school or for mothers who may need to be separated from their infants.
Pump and Save bags allow you to store breast milk in storage bags made for freezing breast milk.
They have a space to label the milk with the pumping date which lets you know when to discard the milk. Please refer to Medela guidelines for storing breast milk.