The 5 Best Breast Milk Storage Bags For Pumping Moms (2018 Reviews)
Frozen breast milk storage bags in a container

How to Find the Best Breast Milk Storage Bags (2018 Reviews)

It wasn’t easy, but you finally managed to conquer your torturous breast pump.

You feel a sense of accomplishment looking at the spoils of your victory – your nutritious breast milk.

Now you just have to put it in something before it does spoil.

You need to find the best breast milk storage bags, so all your hard work doesn’t go to waste.

Our Favorite Storage Bags
ProductVolumeOur Rating
1. Lansinoh Storage Bags6oz
2. NUK Seal ‘n Go6oz
3. Ameda Store ‘n Pour5oz
4. Mommy’s Precious8oz
5. Bow-Tiger Bags6oz

*All links above will take you to the latest prices on or you can read our in-depth breast milk storage bag reviews below.

Why Should I Buy Special Bags?

If you are like I was when I was a new mom, you might wonder why you can’t just use a ziplock bag that you would find in any grocery store. After all, it would be more convenient, and if you can store food in them, shouldn’t they be fine for breast milk?

Here’s why you should pass on the plastic baggies and opt for breast milk storage bags:

  • They are different from ziplock bags – they are specially made to store breast milk.
  • They are BPA-free, thicker and can be used to freeze, thaw and warm the milk.
  • Breast milk storage bags are heavy duty and sterile, which means your baby has a smaller chance of getting sick from any stray germs.
  • It’s much easier to pour milk out of a breast milk storage bag than it is a ziplock bag — many of them have spouts just for that reason.

Breast milk storage bags are also not the same thing as the bottle bags that are sometimes used for feeding. Those bags are much flimsier and are not recommended for storing milk – they are only to be used for feeding purposes.

Why Can’t I Use Cheap Breast Milk Storage Bags?

You wouldn’t go shopping and pick out a pair of shoes simply because they are the cheapest ones in the store. You don’t want to pick out breast milk storage bags solely based on price either – you want to look for quality, and you need to ensure the ones you pick are meeting all of your needs. Even though they are all just bags, some of them have features that make them better than others.

This is why you should consider choosing high quality storage bags over cheap, inferior brands:

1. For the Reliability

Whoever made up that old saying, “It’s no use crying over spilled milk,” had clearly never pumped their breasts.

Nothing can cause a woman to feel like she is turning into The Incredible Hulk faster than a leak from a breast milk storage bag.

Pumping that milk isn’t anyone’s idea of a good time. To see a puddle of it on a refrigerator shelf is enough to bring out some serious rage in any woman. My screams of agony would echo around the world if one of my bags of breast milk went to waste.

Woman pumping her breasts with breast pump

Related Reading:
How To Pump More Milk: The Ultimate Guide

2. For the Convenience

Superior bags have a design that makes it easy to pour milk into and out of these bags without spilling a drop.

As a new mom, it can feel like you’ve spent half your day pumping and you only end up with enough milk to fill a sewing thimble. So you want every last drop accounted for.

3. For the Safety

Unless you are a compulsive cleaner, your refrigerator can be a gross, nasty place. Just to be on the safe side, you want to make sure any breast milk you save is tightly sealed in a heavy duty bag to prevent any contamination from getting in.

You also need to label the breast milk with a date so you can toss any that has expired. The dates also help you rotate the stock in the refrigerator or freezer by allowing you to put the freshest ones in the back. Some bags have designated writing areas that are in an easy-to-spot location.

Related Reading:
How To Increase Your Milk Supply Without Losing Your Mind

What Should I Look For in Breast Milk Storage Bags?

The main thing you’ll want in breast milk storage bags is durability. If you put that bag in the refrigerator or freezer and it gets a hole in it because something else punctured it, you’re going to be upset. And by upset, I mean ugly crying.

Is spilt milk something to get that worked up over? Not ordinarily, but you worked hard to express that milk. You gave up your time and comfort to do it. And when you have a limited milk supply, any waste makes you feel even worse. So you’ll want to look for a thick, durable bag that will limit those leaks.

You’ll also want to consider the size of the bag. If your baby is a newborn, you’ll want to go with a small bag — one that only holds up to four ounces. That way you’re not thawing an 8-ounce bag and watching half the milk go to waste, or you’re not only filling that giant bag up to 4 ounces and watching that other space in the bag go unfilled. That will get expensive.

How Do I Use Breast Milk Storage Bags?

Before beginning to pump, you should wash your hands first, just like you would do if you were preparing dinner for your family (source).

After you’ve finished pumping, you take the milk you’ve collected and put it in a storage bag which you’ll either store in the refrigerator or the freezer. All you have to do is open your bag, pour the milk in and then remove the excess air from the bag before sealing.


You might be tempted to cram as much milk into one bag as you possibly can to get the most bang for your buck. You don’t want to do that, though. You should only put as much milk in one bag as you think your child will drink in one feeding.

If you use 8 ounces of breast milk in a bottle and start feeding your baby, but he’s only able to drink 4 ounces at a time, you’re out of luck.

Once your baby has started feeding off that bottle, any extra breast milk in there needs to be thrown away – it can’t be saved. Once your baby’s saliva has mixed with the breast milk, it can’t be refrigerated again (source).

If your baby needs more than you’ve given her in one bag, you can simply add more milk to her bottle from another bag. Then you can reseal that bag and put it in the refrigerator again until you need the rest of it.

Don't Overfill

Another reason you shouldn’t overfill the bags is that if you plan to put them in the freezer, the milk will expand as it freezes. You don’t want to throw away bags that have popped open in the freezer because you were trying to overstuff them.

How Will I Know Which Bag is The Freshest?

You should label the bag with a date and time to make sure you know when it was pumped. If your refrigerator is anything like mine, things get shoved around, moved from shelf to shelf and jammed way in the back. It’s easy to lose track of which one is the oldest bag if you don’t label it. It’s a simple step that takes the guesswork out of milk storage.

If you plan to bring milk bags to a daycare or a childcare provider so your baby can have breastmilk while you are at work, you should also write your child’s name on the bag. I spent a year right after college working in a daycare while I looked for a job in my profession and it was unbelievable how many people would forget to put their child’s name on the bag.

At any given time in the daycare there were multiple bags of breast milk in the refrigerator, but there was no way to tell who they belonged to. Grab a marker and always write a name on bags you are taking outside of your house.

The Best Breast Milk Storage Bags of 2018

Now that you know exactly what to look for when buying storage bags, as well as how to safely store you milk —

These are our top 5 picks in 2018:

1. Lansinoh Breast Milk Storage Bags

Lansinoh Breastmilk Storage Bags, 100 Count convenient milk storage bags for...

These are some of the larger bags on the market, and they have a patented double zipper seal, which means your breast milk shouldn’t end up all over the refrigerator shelf and your nearby fruits and vegetables.

It saves you from having to clean up your fridge and pump extra milk to make up for the loss. Lansinoh bags have a pourable spout to help get breast milk into bottles without spilling a drop.

These bags are designed to lay flat in the refrigerator or freezer to save room while storing multiple bags.


  • It’s easy to tell when the double zipper is closed.
  • If your baby is a little older and needs a larger quantity of breast milk, you might like these big bag sizes. The bags say they hold 6 ounces.
  • Moms worried about the environment should be happy to know these bags are recyclable.
  • These don’t have a plastic smell or taste.

2. NUK Seal ‘n Go Breast Milk Bags

NUK Seal N Go Breast Milk Bags, 50 count

These bags also use a double zipper seal, and they guarantee they are 100 percent leak-proof. NUK bags have a top seal that prevents tampering and have a gusset-free bottom which should mean fewer leaks from the bags’ corners.

The bags are self-standing, but they can also be stacked in the freezer to save room. The bags hold 6 ounces of milk. When frozen, you simply run warm water over the bags to thaw the milk. Because the bags are waterproof and seal well, all you’ll get is pure milk after you’ve melted it and poured it into a bottle – not a watered-down mixture.


  • Moms may find it easier to get the air out of these bags because they aren’t as thick as some other bags.
  • The writing section used for labeling is on the tab, not on the bag like some other brands.

3. Ameda Store ‘n Pour Breast Milk Bags

Ameda Store N Pour Breast Milk Storage Bags with Adapters, 20-Count, Resealable...

These bags were made with a multi-ply design to help avoid splits and cracks. Ameda Store ‘n Pour bags have resealable zippers that are easy to close.

They also have a pour spout to cut down on spills. The bags are BPA free and safe for the freezer.

These bags are made of a thick plastic that helps the bags stand up on their own, which frees moms from needing extra arms to get milk transferred into the bags. Ameda bags are smaller than many others, only holding 5 ounces.


  • Moms should like that the bags don’t often burst if they aren’t overfilled.
  • Women may like that the handy pour spout will allow them to fill a bottle even while they are holding their baby.

4. Mommy’s Precious Breast Milk Bags

110 Count Breastmilk Storage Bags 8 Oz 235 ml Breastfeeding Freezer Storage...

These bags are not only BPA free – they are latex free and phthalate free. Mommy’s Precious bags stand up by themselves because of their gusseted bottom design, so you don’t have to struggle and prop them up just to fill them.

The bags are made in China and uses a double zipper lock for closure. These are some big bags – they hold up to 8 ounces of milk. Once filled, they freeze flat to save on storage space. These bags claim their measuring lines are 95 percent accurate, which should be a big help to women who are tracking every ounce their child eats.


  • The accurate measurements should help moms assess how much milk to pour into each bag.
  • The safety seal on the bags prevents bacteria from entering the bag before they have been used.

5. Bow-Tiger Breast Milk Storage Bags

Nurture Right Breastmilk Storage Bags, 6oz / 180ml Pre-Sterilized & BPA-FREE...

Latex and BPA free, these bags also are made from a phthalates-free material. Bow-Tiger bags stand on their own and have a double zipper seal which makes them less likely to leak.

Made of a thick, sturdy plastic, these bags hold 6 ounces each and come with a safety seal to ensure the bags haven’t been contaminated before use.

A sizable record panel on these bags has a spot for you to write your baby’s name, the number of ounces in the bag, and the date and the time you pumped the milk.


  • These bags don’t spill when you are pouring milk into them because the plastic is so rigid.
  • Moms may appreciate the fun heart decorations on the bags.
  • These bags have a lot of extra room after the full mark, which might make moms feel more confident the bags won’t leak after the milk expands in the freezer.

Our Top Pick Is…

Lansinoh takes the prize as my favorite breast milk storage bag. Despite our best efforts as moms and protectors of our breast milk, spill and leaks are a fact of life. They will occasionally happen with every brand out there. But the pourable spout and the patented double zipper seal makes leaks a rarity, not an everyday occurrence with these bags.

Lansinoh bags are the best all-purpose storage bag – they work well in the freezer when thawing out milk or for milk that is kept in the refrigerator. They don’t have that horrible plastic taste or smell. They hold a little more milk than some of their competitors, which is nice for when your baby’s appetite begins to grow.

Frequently Asked Questions

Here are some commonly asked questions about breast milk storage bags to help you in your breastfeeding quest:

1. Can I Reuse Breast Milk Storage Bags?

One of the most important things to know about breast milk storage bags is that they are not reusable. You use them once, and then you pitch them. No questions asked. Don’t try to rinse and reuse them. They will no longer be sterile, and it isn’t worth taking the chance of endangering your baby just to save a few dollars.

2. How Long Does Breast Milk Last in the Freezer?

If you’ve just pumped a fresh batch of breast milk, but you won’t need it for a while because your baby is napping, what should you do with it? Should you put it in the refrigerator right away?

Here are the guidelines:You can safely leave breast milk on the counter, completely unrefrigerated if your room is at 77 degrees Fahrenheit or cooler, for up to 8 hours (source).When stored in the refrigerator, you can keep breast milk for 5 days. In an upright deep freezer, breast milk can be stored from 6 to 12 months (source). If you’re storing it in the freezer section of your refrigerator, it will only last 6 months.

3. How Do You Unfreeze Breast Milk?

You can thaw it in the refrigerator, which can take around 12 hours. Or you can thaw it by running it under warm water while it is still in the storage bag. You never thaw or heat the breast milk storage bags in the microwave. And once the milk is thawed, you can’t refreeze it.

4. How Long is Breast Milk Good for After Defrosting?

After you have defrosted breast milk, it can last for up to 24 hours if kept in the refrigerator. You should always defrost the oldest milk first – that way you can minimize wasting breast milk by not using it before it expires.

5. How Can I Tell If Breast Milk is Bad?

Every mom is scared of giving her child spoiled breast milk. By paying attention to dates and weird smells, you can minimize the chances of giving your baby spoiled milk.

Smell any milk that’s been in the refrigerator for three days or more. It can certainly last longer than that in the fridge, but it is wise to start checking it at that point.

Related Reading:
Pumping 101: How to Tell if Your Breast Milk’s Gone Bad

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Jenny Silverstone

Jenny is just another Mom trying to do her Best. She loves organizing things into lists and helping others find what they are looking for. When she's not using her powers to find her kids missing socks, you can find her giving actionable parenting advice & buyers guides at