How to Use Breastmilk Storage Bags: Step-by-Step Guide for Freezing and Thawing

Quick Answer

To use breastmilk storage bags, express milk into the bag, remove excess air, seal tightly, and lay flat to freeze. Thaw in the refrigerator or under warm running water, then pour into a bottle for feeding. Always label with the date and use within recommended storage times.

Breastmilk storage bags are a convenient way to save your expressed milk for later. Whether you're building a freezer stash before returning to work or just want to store a few extra ounces, knowing how to use them properly helps keep your milk safe and your baby happy. This guide walks you through each step, from filling and freezing to thawing and feeding.

We'll also highlight the features of Lansinoh Breastmilk Storage Bags, a popular choice for their durability and ease of use, so you can store your milk with confidence.

Why Choose Breastmilk Storage Bags?

Breastmilk storage bags are designed to save space and minimize waste. Unlike bottles, they lie flat in the freezer, making it easy to stack and organize. They're also pre-sterilized and disposable, which means no extra washing—just fill, seal, and freeze. This is especially handy when you're pumping on the go or building a stash over time.

When selecting bags, look for features like a double zipper seal and reinforced seams to prevent leaks. Lansinoh Breastmilk Storage Bags are built super strong with a double zipper seal and reinforced double sealed side seams for ultimate protection. They're also BPA and BPS free, giving you peace of mind about what touches your milk.

• Check the bag's capacity before filling to avoid overfilling.
• Always use a new bag for each pumping session to maintain hygiene.

Step-by-Step Guide to Using Breastmilk Storage Bags

Using breastmilk storage bags is straightforward, but a few details make a big difference. Start by washing your hands and ensuring your pump parts are clean. Then, express milk directly into the bag using a breast pump that connects to the bag, or pour from a collection bottle. Leave some space at the top because milk expands when frozen.

After filling, squeeze out as much air as possible before sealing. This helps prevent freezer burn and saves space. Use the white label area to write the date and, if needed, your baby's name. Then, lay the bag flat in the freezer. Once frozen, you can store them upright or stack them to save space.

• Never fill the bag beyond the 'max' line if indicated.
• Always label with the date before freezing.

Thawing and Feeding

Thawing breastmilk is just as important as freezing. The safest way is to move the bag from the freezer to the refrigerator overnight. If you need it sooner, you can hold the sealed bag under warm running water or place it in a bowl of warm water. Never use a microwave or boiling water, as this can create hot spots and destroy nutrients.

Once thawed, gently swirl the bag to mix the separated cream, then pour the milk into a bottle for feeding. Do not refreeze thawed milk, and use it within 24 hours if thawed in the refrigerator. Always check the temperature on your wrist before feeding.

• Avoid thawing at room temperature for more than 2 hours.
• Discard any leftover milk after a feeding.

Step-by-Step: Using Breastmilk Storage Bags

1. Prepare and express: Wash your hands and ensure pump parts are clean. Express milk directly into the bag or pour from a collection bottle. Checkpoint: Leave about an inch of space at the top to allow for expansion.
2. Seal and label: Squeeze out excess air, then seal the double zipper tightly. Write the date and any notes on the label. Checkpoint: A tight seal prevents leaks and freezer burn.
3. Freeze flat: Lay the bag flat in the freezer. Once frozen, you can stand them upright to save space. Checkpoint: Freezing flat helps milk thaw more evenly and stores more efficiently.
4. Thaw safely: Thaw in the refrigerator overnight or under warm running water. Never use a microwave. Checkpoint: Use thawed milk within 24 hours and never refreeze.

Product Facts

• Breastmilk Storage Bags - 6oz: Lansinoh's #1 selling breastmilk storage bags are ideal for storing, freezing and protecting precious breastmilk. Built super strong, Lansinoh's breastmilk freezer bags come with a double zipper seal to prevent leakage and reinforced double sealed side seams for ultimate protection. Presterilized for safe storage plus BPA and BPS free. Easy to use and saves time by pumping directly into the bag. These features mean fewer leaks, less mess, and confidence that your milk is stored safely.
• Thrive 2-in-1 Breast Pump Valve for PowerPump & Wearable Pump: A spare set of parts when you need them! Great to have on hand when you’re pumping away from home and need an extra set of clean parts. Or keep it on hand to replace parts that wear over time. Having spare valves ensures your pump works efficiently, so you can pump directly into storage bags without interruption.

Using breastmilk storage bags is a simple and effective way to preserve your milk for future feedings. By following these steps—fill, seal, freeze, and thaw—you can ensure your baby gets safe, nutritious milk every time. With reliable bags like Lansinoh's, you can store with confidence and focus on enjoying your time together.