Support for your
WONDBORN Portable Breastmilk Cooler

The cooler's dimensions are approximately 4.44 inches in diameter × 10.06 inches in height, and it weighs about 3.34 pounds (including the frozen cooling rings).

Total capacity is 22 oz (approx. 660 ml), including two separate 11 oz (approx. 330 ml) bottles, suitable for daily use or multiple pumping sessions.

Freeze at -18°C (0°F) for at least 12 hours before use for optimal performance.
The outer bottle does not require refrigeration and can be stored at room temperature.

New Bottle Set:
The new bottle set is dishwasher safe and compatible with standard bottle sterilizers and bottle washers.
It features upgraded materials and an added silicone sealing ring in the lid for enhanced leak protection. To maintain a secure seal, regularly remove and clean the silicone sealing ring.
After cleaning, reinstall the silicone sealing ring by following these steps:
1. Align the silicone sealing ring with the groove inside the lid and place it evenly.
2. Press around the entire ring with two fingers to ensure it is fully seated, securely fitted, and not loose or lifted.

Original Bottle Set:
The original bottle set does not include a silicone sealing ring. Hand wash with warm water and mild detergent, then allow it to air dry naturally to help extend the product’s lifespan.
If the bottle cap does not close properly, please contact support@wondborn.com.

After each use:
1. Disassemble all parts (inner bottles, outer bottle, and cooling rings).
2. Wash with mild detergent
3. Wipe dry or air dry
4. Reassemble only when fully dry

Yes, it is designed to be travel-friendly. TSA regulations permit you to bring breast milk in reasonable quantities through airport security. This ice-free portable cooler for breast milk makes the screening process smooth and straightforward. We recommend keeping your milk in the cooler to present it to TSA agents separately from your other liquids.

With 4 fully frozen ice rings (frozen for at least 12 hours) and the cooler lid securely closed, it can keep breast milk below 40°F for up to 24 hours. Actual cooling performance may vary depending on ambient temperature and how frequently the cooler is opened.

The ice rings can be used in different combinations depending on your needs:
1 ice ring + 1 bottle: Short outings, quick errands, or appointments (approx. 12 hours)
2 ice rings + 1 bottle: Work commutes or daily activities outside the home (approx. 15 hours)
3 ice rings + 2 bottles: Full-day outings, workdays, or overnight use (approx. 17 hours)
4 ice rings + 2 bottles: Long trips, travel, or extended storage needs (approx. 26 hours)
After use, refreeze the ice rings for future use.

Please first check our How-to Videos or FAQs for basic troubleshooting.
If the issue persists (missing parts, damaged accessories, cooling performance concerns, or usage questions), contact support@wondborn.com.
We offer a one-year warranty for your peace of mind.