FREQUENTLY ASKED QUESTIONS

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About Freeze-Drying & Safety:

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Is freeze-drying safe? Do you add anything?

Freeze-drying is a trusted method used by global human milk banks - and it’s 100% natural, chemical-free. Your breast milk stays as-is, with no additives or preservatives.

What happens to my milk when frozen?

Long-term freezing can degrade nutrients, especially fats and energy. Studies in 2014 and 2019 found significant nutrient loss in frozen milk over time. Freeze-drying retains ~97% of those important components.

Will freeze-drying affect nutrition?

Research have shown that freeze-drying breast milk is a safe and more effective way of preserving the nutritional, immunological, and probiotic properties of breast milk.

Freeze-drying retains over 97% of nutrients. Our own lab tests back this up too.

Milk Handling Questions

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How do I store milk before pick-up?

Freeze your milk flat - not standing - to save space and for easier pack preparation. Leave room for expansion, remove air pockets, and only use BPA‑free, leak-proof double-zip bags from trusted brands.

How long can I freeze breast milk?

  • Up to 6 months in a standard freezer (–15 °C)
  • Up to 12 months in a deep freezer (–20 °C)

Send your milk in as soon as possible - it ensures you lock in freshness before more nutrients degrade.

Is there a min/max volume per bag?

There's no restrictions as long as it is not overfilled.

We process them together to maintain balanced nutrition across your powdered packets.

What types of storage bags are acceptable?

Use pre-sterilized, freezer-safe, double-zip, leak-proof bags from trusted brands (Autumnz, Avent, Lansinoh, Medela, Pigeon, etc.). Bags must be intact, clean, and completely frozen. No jars, tubes, silicone bags, or Ziplocs please.

My baby didn’t like my thawed milk, will freeze-drying help?

Possibly, yes. That odd smell or taste in thawed milk often comes from lipase, a natural enzyme that breaks down fat. Some mums produce milk with higher lipase activity, which can create a soapy or metallic aftertaste.

While freeze-drying doesn’t eliminate lipase completely, it removes water, which slows further enzyme activity -making the milk milder in taste and smell.

Some babies who rejected thawed milk do better with freeze-dried (mine included 😉)


And even if bub still prefers fresh milk, you can still mix the powder into solids down the line, so your efforts never go to waste.

How will I know I’m getting my own milk back?

We process one mama’s milk at a time -always.

Each batch is tagged with your name and last 4 digits of your NRIC. We also document every intake with photos for traceability.
You can trust that what comes back to you is exclusively yours - because that's the standard we’d want for our own children too.

Can I combine milk with a friend?

Nope - each mama’s milk is processed separately in a one‑mama‑at‑a‑time system to ensure safety and traceability.

Ordering & Packaging

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How many powder packets will I get back?

Bags vary in water/fat content, but as a guideline:

  • 3 L typically yields ~380–400 g powder
  • Default packet size is ~15 g → approx. 25–30 sachets

We custom pack to your requirement (90-180ml) - you can request custom packet sizes at checkout or via message.

How is the powder packaged?

Each packet is vacuum-sealed inside food-grade mylar, without chemical absorbers, keeping it shelf-stable for 3 years.

How do I prepare my milk for pick-up?

Check your bags for tears, leaks, or dirt. Freeze them ahead of our pick-up, collect your reserved amount in a separate zip bag, and keep it frozen until we arrive. We bring cooler bags and ice sheets for safe transport.

When can I expect to receive my order?

Processing time depends on volume and waitlist - typically 5 days to 3 weeks. We’ll message you on WhatsApp once it’s ready and schedule delivery. Larger or overseas orders may take longer.

Will I receive updates?

Yes! We love keeping you in the loop - you’ll get process notifications via WhatsApp. And you’re welcome to message us anytime.

Using your freeze-dried breast milk powder:

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How do I reconstitute the powder?

Each bag is labeled with the exact water amount needed. Add room temp or 40 °C purified water, add the powder, swirl to mix, test the temperature, and feed immediately. Avoid microwaves and reheating above 45 °C.

Please refer to How To Use for more information.

How many bottles can I make per pack?

One ~15 g pouch yields about 125 ml of reconstituted milk. You can customise pack sizes if you'd like.

How do I store powder and mixed milk?

Unopened packs: Cool (15–30 °C), dry place, away from sunlight.

Opened packs: Seal and use within 2–3 days - don’t refrigerate.

Reconstituted milk:

  • Room temp: Use within 2 hours
  • If stored in fridge: Use within 24 hours
  • Don’t re-freeze or keep leftover mixed milk.

How long does the powder last?

Properly stored, it stays good for up to 3 years - as verified by SGS shelf-life testing.

General:

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Can I use the information provided on this website as medical advice?

No, and we want to be super clear about that.

The information we share on this website, via WhatsApp, and in your reports - is based on reputable sources (HPB, CDC, WHO, SFA, etc.), along with our own testing and experience. But it is not a substitute for professional medical advice.

Freeze-dried breast milk is not sterile, just like frozen or fresh expressed milk. This means it may not be suitable for premature babies, medically vulnerable infants, or children with compromised immune systems.

Always consult your paediatrician if you're unsure about suitability or usage, especially if your child has unique dietary or medical needs.

Wonderbewbz is here to support you, not to replace your care provider.

Do you have any license/cert?

Our cleanroom is ISO‑6 certified. While local authorities don’t mandate specific licenses for our service, our operations are built with those standards in mind. And we're working toward additional certifications!