Milk
• Keep in a refrigerator with a temperature of 4 degrees C or colder from three to five days. Store in the back where it is coldest.
• Unopened: use by date specified on the pack
• You may combine milk you collected that day with frozen milk as long as it's chilled for at least an hour first, and the amount that you are freezing is less than half of the frozen amount. Fresh milk retains more of its protective properties than frozen milk, so whenever possible, use refrigerated rather than frozen milk for feeding your baby. But note that frozen breast milk still has more health benefits than formula milk.