Breast Milk Storage Bags

What Are They, the Pros and Cons of Using Them, and 6 Popular Brands

What Are Breast Milk Storage Bags?

Breast milk storage bags are plastic bags specifically made for the collection and storage of breast milk. They're designed to withstand freezing and thawing, and they have reliable seals to prevent leaks. They're also pre-sterilized so they're convenient and ready to use right out of the box. Ordinary plastic sandwich bags aren't the same as breast milk storage bags, so they're not recommended for the storage of breast milk. 

Using Breast Milk Storage Bags

When using some brands of breast milk storage bags, you have to pump your breast milk into a separate container and then transfer it into the bag to store. However, other brands come with a convenient adapter that allows you to pump directly into the bag. But, when you're ready to thaw out and use the breast milk stored in the bag, you'll still need to transfer the milk from the bag to a bottle for your baby. 

Other Breast Milk Storage Options

Plastic breast milk storage bottles, food-safe glass containers, and breast milk storage trays are other available storage options. There are advantages and disadvantages to each type of container. Here are the pros and cons of storage bags.

The Pros of Breast Milk Storage Bags

  • Breast milk storage bags are usually less expensive than plastic containers or glass bottles.
  • Bags are convenient.
  • They're disposable, so you do not have to clean them.
  • They take up less storage space in your refrigerator or freezer.
  • Breast milk in storage bags thaws out more quickly than milk stored in glass or plastic containers.

The Cons of Breast Milk Storage Bags

  • Breast milk storage bags are meant to be used one time.  They cannot be washed and reused. So, they aren't as eco-friendly as the other storage options, and over time, the cost of buying new ones can add up.
  • Plastic storage bags are not as strong as glass or hard plastic containers so they're more likely to leak or break compared to plastic bottles or glass containers.
  • You cannot pump directly into all brands of storage bags. You may have to pump into a container that's compatible with your breast pump, and then transfer your breast milk from that container into the plastic bag for storage. The extra steps are more time consuming. 

6 Popular Brands of Breast Milk Storage Bags

All the brands of breast milk storage bags below are designed specifically for the storage of breast milk. They are BPA (Bisphenol A) free, disposable, pre-sterilized, and freezer-safe.


Medela's Pump & Save Breastmilk Storage Bags hold approximately 5 oz (150 ml) of breast milk.  These bags have a stand-up bottom and a leak-proof zipper that's easy to close. They also have an oxygen barrier to protect the nutrients in breast milk during storage. Pump & Save bags come with an adapter that's compatible with Medela brand pumps so you can pump directly into the storage bag. 


Lansinoh Breastmilk Storage Bags hold approximately 6 ounces (180 ml) of breast milk. They have a leak-proof, double zipper seal, and they lay flat in the freezer for easy, space saving storage.


Ameda Store 'N Pour Breast Milk Storage Bags hold approximately 5 oz (150 ml) of breast milk. The starter kit comes with a pump adapter which allows you to pump your breast milk directly into the stand-up bag. These bags have an easy to close leak-proof seal and a unique spout that can be torn open when you're ready to transfer your breast milk to a bottle. The spout lets you easily pour the breast milk out of the storage bag without spilling it. 


Honeysuckle Breastmilk Storage Bags are strong with a secure, leak-proof, double zipper seal. They have a gusseted bottom so they can stand up when they're full. They can also be stored standing in an upright position. These environmentally friendly storage bags are biodegradable and recyclable.


The Seal 'N Go Breast Milk Storage Bags by NUK can hold up to 6 oz (180 ml) of breast milk. They have a double zipper seal and a stand-up bottom.


These durable stand-up breast milk storage bags from Dr. Brown's are extra thick with a leak-proof double zipper seal. Plus, a conveniently perforated top makes it easier to transfer the breast milk out of the bag and helps to prevent spills. 


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