Breastmilk can be stored in milk storage bags for up to 4 hours at room temperature, 48 hours in the freezer, and up to 6 months in the freezer. Breastmilk is the most suitable and safe natural food for babies. When the mother and baby are separated, or when the mother is at work and cannot breastfeed directly, it is necessary to suck out the breastmilk and store it in a special milk storage bag. It is usually kept at room temperature of 20℃-30℃ for no more than 4 hours, at 4℃ for no more than 48 hours, and at -15℃-5℃ for up to 6 months. Wash your hands before milking, and prepare a clean container, each milking should be alternated between the two udders. The milk storage bag for storing breastmilk should be specially placed on the first floor of the refrigerator and should not be mixed with other foodstuffs. Stored breastmilk should be warmed with lukewarm water at 37℃-40℃ before feeding and consumed in one go, with the remaining milk to be discarded.