Mothers who are pumping breastmilk for their infants should store the milk in the cleanest and safest way. It can be stored in any clean container: plastic, glass or nurser bags. Recommendations for storage temperatures and times vary greatly from one authority to another. We are recommending guidelines based on research and common sense.
Freshly pumped breastmilk can be kept at room temperature for 4 hours. If it will need to be kept longer, please refrigerate. Milk that has been previously chilled should be kept at room temperature for no longer than an hour or so.
Breastmilk may be stored in a refrigerator 4-8 days. If you think that you may not use it within that time period, freeze it. If you find you have milk that has almost reached its expiration date in the refrigerator, you may freeze it for later use.
Breastmilk may be stored in a freezer for up to 3 months and in a deep freeze for up to 12 months. The freezer is cold enough if it keeps your ice cream solid. That will be about 0° For -20° C. It should be placed in a part of the freezer that will not be subject to changes in temperature as the door is opened and closed. If plastic nurser bags are used, they should be doubled or protected from being bumped and torn in the freezer.