A human milk bank collects breast milk donations from mothers who produce more milk than their babies need. They pasteurize and appropriately store the donor milk in medical freezers, and provides it to infants born prematurely or with very low birth weight (or other reasons) in neonatal intensive care units upon request. You can look at a milk bank as an advanced kitchen, and it is often a part of the neonatal intensive care unit in hospitals. The milk banks recruits donors, do follow-ups, and deliver equipment to donors.