The 5 Best Breast Milk Storage Bags of 2024

Written by Ilona Bannister

Published on December 18, 2023

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• Breast milk storage bags are great for collecting and storing breast milk safely. 
• They’re an excellent space saver for your fridge and freezer if you’re storing breast milk for long-term use. 
• Bags that attach directly to your breast pump make it even easier for busy moms to pump and store. 

If you’re preparing to head back to work but you want to keep breastfeeding your baby, good breast milk storage bags are a must-have. 

These easy-to-use, sterile, and space-saving bags let you collect, label, and store your precious breast milk. They also make it easy to transport your milk to your baby’s childcare setting so that you don’t have to stop giving your baby breastmilk once they start daycare. 

As with all things baby, there are many brands to choose from, though not all breastmilk storage bags are alike. Take a look at our guide to the most trusted and best breast milk storage bags of 2023. 

Ameda Pump N’ Protect Breastmilk Storage Bags: Best Overall 

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The reasonably priced Ameda Pump N’ Protect Breastmilk Storage Bags are a reliable choice for storing your precious breast milk. 

They have a double zipper lock to avoid leakage when you’re transporting milk. The gusseted bottom means they’re free-standing which helps avoid spills when you’re transferring from pump to bag or bag to bottle. 

Ameda bags lie flat in the freezer so they take up little space while safely storing your frozen supply. If you have a compatible Ameda pump, you can also pump directly into the bag, eliminating the need for extra cleaning and sterilizing.  

These BPA-free bags are a reliable favorite of many moms because they do exactly what you need them to at a reasonable price. 

Material: Plastic | Aproximate Volume: 6 ounces | Dimensions: ‎7.5 x 5.1 x 0.27 inches
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Lansinoh Breastmilk Storage Bags: Best Basic Storage Bags

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When in doubt, these Lansinoh Breast Milk Storage Bags are a reliable choice for your breast milk storage needs. 

Lansinoh has long been a trusted name. Many moms have relied on these bags to get them through their first months of breastfeeding. 

These lay-flat bags are easy to store in your fridge or freezer. They have clear markings and an easy-to-write-on label. The pour spout prevents spillage, although they’re not truly stand-alone and so they can be a little tricky to use. 

The top of each bag has a perforated safety seal to let you know the bag is sterile and hygienic. However, this means you’ll be opening the top perforation every time you use one, which adds an extra step to the process. 

Finally, the bags are also compatible with Lansinoh pumps, so that you can pump directly into the bag, eliminating extra hassle. 

Material: Plastic | Aproximate Volume: 6 ounces | Dimensions: ‎3.5 x 6.25 inches
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Medela Pump & Save Breast Milk Storage Bags: Best Pump and Store Brand  

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Many moms swear by their Medela products for everything to do with breastfeeding. If you’re a Medela fan and own one of their pumps, these compatible Medela Pump & Save Breast Milk Storage Bags may be your best bet for storing milk. 

They’re made of double-layered plastic, have a resealable zip, and are designed to lay flat in your freezer. Some moms find that they don’t stand or pour as well as other bags that also have those features built-in. 

However, being able to pump directly into the bag is key, especially for busy moms. 

The Medela bags are also smaller than other brands. This is a plus if you only want to freeze or defrost small quantities of milk.

These bags are more expensive than others, but for the name and quality that you can trust, they’re worth it, especially if they attach to your pump. 

Material: Plastic | Aproximate Volume: 5 ounces | Dimensions: ‎‎9.65 x 2.37 x 9.57 inches
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Momcozy Silicone Breastmilk Storage Bags: Best Reusable Milk Storage Bags 

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For parents who prefer an eco-friendly, reusable alternative to single-use plastic storage bags, these Momcozy Silicone Breastmilk Storage Bags are a great choice.

Durable silicone is freezer, dishwasher, and sterilizer safe. The twist cap and no leak sides are guaranteed to take good care of your breastmilk.

Moms love that they’re easy to clean, even with a bottle brush. Their use beyond weaning as containers for baby food and toddler drinks means that you can use these again and again for years. 

Compared to traditional, single-use disposable bags, these are expensive. So if your goal is to build up a long-term supply of frozen breastmilk, these may not be cost-effective. 

Otherwise, for daily use, these storage bags are environmentally conscious and a smart and safe way to store your breastmilk. 

Material: Silicone | Aproximate Volume: 8.5 ounces | Dimensions: ‎4.49 x 8.35 inches
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Nanobebe Breastmilk Storage Bags: Best for Tracking Supply 

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Nanobebe Breastmilk Storage Bags have a completely different design to most breastmilk storage bags. The rounded bean shape lets them lay flat on top of each other like slim discs in your freezer.

Put the bags in the Nanobebe freezer organizer and you can easily track which bag to take next. You can use a “first in, first out” system without having to fumble with checking the dates on all your bags. 

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The round shape provides greater surface area for faster and more even thawing, heating, and freezing, which Nanobebe says preserves nutrients better. 

This is an innovative approach to breast milk storage, but the extra plastic holder and extra thick plastic bags don’t check the eco-friendly boxes you might be looking for. 

Material: Silicone, Polypropylene | Aproximate Volume: 5 ounces | Dimensions: 7.32 x 7.28 x 3.43 inches
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Reusable vs Disposable Breast Milk Storage Bags

Before deciding whether to use reusable or disposable breast milk storage bags, consider how frequently you’ll be using the bags and what you’ll need to use them for. 

What Are Breast Milk Storage Bags? 

Breast milk storage bags are designed for the safe and easy preservation and storage of your breast milk. 

They’re slim and light, so they take up much less space than other containers in your fridge or freezer, especially if you are planning to freeze and store a lot of milk in preparation for going back to work. 

They’re also hygienic. You can be assured every time you use a new bag that it’s sterile and safe to use for your baby’s milk.  

Are All Breast Milk Storage Bags Disposable? 

Most breast milk storage bags on the market are for single use only. After they’ve done their job storing your milk and you’ve fed your baby, they’re thrown away.  

Most storage bags are not designed to be washed, sterilized and reused. The reason for this is safety. Breast milk, like any food product, is susceptible to bacterial contamination. 

It’s generally considered safest to use these bags once to collect your breast milk, freeze it and store it, defrost it into a bottle, and then dispose of it to reduce the chance of any bacterial growth. 

What Are Reusable Breast Milk Storage Bags? 

As we all look to reduce our reliance on plastic, some parents may want to find an alternative to the single-use disposable breast milk storage bag. 

Recyclable storage bags are an option made of plastics that are easy to recycle along with your other recyclables. 

Reusable breast milk storage bags are also available; however, you may find that you will use these differently than you use traditional single-use bags. 

Reusable bags are made of silicone. They’re sturdy, thick, leak-proof, and easy to clean and sterilize. When your baby is weaned, you’ll also be able to use these for so many other purposes in your kitchen. 

Although these reusable bags sound like a great alternative, their cost makes them impractical if you’re building up a long-term supply of frozen milk. They’re also thick, so they take up a lot more storage space than single-use plastic bags.  

Finally, reusable bags may be just what you’re looking for if you’re storing breast milk for short-term use on a daily basis. If you need to store breast milk for a long-term frozen supply, you won’t really be using and reusing bags. They’ll just be taking up space in your freezer. 

What to Look for in Breast Milk Storage Bags

Although it may seem like a simple product to shop for, if you’re breastfeeding and pumping, there are a few things you’ll want to check when you’re choosing breast milk storage bags.