Here you go ladies, from Medela's website.
Storing Breastmilk
It is normal for pumped milk to vary in color, consistency and scent depending on your diet. Stored milk separates into layers. Cream will rise to the top. Gently swirl the warmed bottle to mix the milk layers.
You can continue to add small amounts of cooled breastmilk to the same refrigerated container throughout the day. Avoid adding warm milk to already cooled milk.
Store your milk in glass or hard plastic containers, or in milk storage bags made especially for breast milk. The Medela® Pump & Save™ Breastmilk Storage Bags special plastic retains breastmilk’s beneficial properties. Leak-proof, easy-to-close zipper top. Place smaller bags inside a larger food storage bag to prevent accidental punctures.
Freeze milk in 2 to 5 oz portions. Small amounts will thaw more quickly. You will waste less milk this way and will avoid over-feeding. Liquids expand when frozen. Be sure to leave some extra room at the top of the container so the bottle or bag won’t burst.
Seal containers tightly. Write the date on a piece of masking tape on the bag or bottle. Use the oldest milk first.
If you do not plan to use the milk within a few days, freeze it right away in the coldest section of your freezer. Do not place the bottle or bag up against the wall of the freezer.
