Whether you're planning for your return to work, heading out for a well-deserved break, or simply building a freezer stash, storing breast milk safely can make a world of difference. With the right know-how (and a few helpful tools), you can protect your milk’s nutrients - and your peace of mind.
Why Safe Storage Matters
Breast milk is packed with immune-boosting antibodies and essential nutrients tailored to your baby’s needs. Storing it correctly helps preserve these benefits, especially when you're pumping frequently or building up a stash for later use.
If you're planning to express milk regularly, using an efficient double breast pump like the Bubka Move can help drain the breast more thoroughly - this not only protects your milk supply but makes pumping sessions faster and more comfortable.
Storage Guidelines at a Glance
Keep these timeframes in mind for storing your expressed milk:
- Room Temperature (up to 2pm 6°C): Safe for 6-8 hours
- Cooler Bag with Ice Packs: Use within 24 hours
- Fridge (a 5°C or colder): Ideally used within 3 days- store at the back where it's coldest!
- Freezer (separate door): Safe for 3–6 months
- Deep Freezer (-18°C or colder): Up to 12 months, but best used within 6 months
-
Thawed Milk (not refrozen): Use within 24 hours from when completely defrosted.
https://www.breastfeeding.asn.au/resources/storing-ebm
Need help sticking to these windows? Labelling your milk with the date and time helps you track everything easily.
Smart Portioning = Less Waste
Expressing and freezing breast milk in smaller amounts - like 60 mL (2 oz) portions - is more convenient and reduces waste, especially in the early weeks when your baby’s appetite changes quickly.
For fuss-free freezing, store expressed breast milk in Bubka’s Breast Milk Bags, which are leak-proof, and easy to label. Just remember to leave a little room at the top - they’ll expand as they freeze!
Easy Organisation Tips
- Label every bag with the date (and time if you’re keen!)
- Use the oldest milk first
- Keep milk at the back of the freezer for the most stable temp
- Use a tray or container to store bags flat and upright for more space
- If you’re expressing often or pumping through the night, Eco Quick Clean Wipes can help make pump part clean-up easier and quicker between sessions.
Freezing and Thawing: What to Know
- Thaw frozen milk in the fridge overnight, or place the sealed milk bag in warm water
- Never microwave - it can create hot spots and reduce milk quality
- Once thawed, gently swirl to mix separated fat
- Use thawed milk within 24 hours, and never refreeze it
- If you notice a soapy smell after thawing, it’s likely due to lipase - an enzyme that’s totally safe but can alter the taste. Your baby might not mind, but if they do, try scalding milk before freezing next time or consider freeze-drying your breastmilk.
Can I Combine Milk From Different Sessions?
Yes - just make sure any freshly expressed milk is cooled in the fridge first before mixing it with already chilled or frozen milk. Then, label it with the date of the older batch to stay organised.
Getting Set for Feeds
When preparing a bottle, pour from the storage bag into a clean feeding bottle just before feeding. Test the milk temperature on your wrist - it should feel warm, not hot.
If you’re pumping frequently, your nipples may get a bit tender. Our Silver Soothing Cups offer natural relief between sessions and can be worn discreetly in your bra.
Planning to Pump at Work?
Balancing breastfeeding and returning to work can feel overwhelming, but with the right strategies and support, it is possible. Our guide to working while breastfeeding covers everything from pumping schedules and storage tips to how to advocate for your needs at work.
In Summary
With a little preparation and the right tools, storing breast milk becomes simple, safe, and stress-free. Whether you’re building a stash, returning to work, or just want more flexibility in your feeding routine, these best practices will help you protect every precious drop.
You’ve got this - one feed, one bag, one day at a time. 💜