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8 Best Breast Milk Cooler Bags for Work and Daycare

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Are you returning to work soon and plan to pump?

Breast milk cooler bags are the perfect solution for moms who need to keep their breast milk fresh while they’re away from home, whether it’s for work or daycare.

Today’s breast milk cooler bags are easy to use and far more stylish than even just a few years ago.

On top of that, they’re insulated to keep breast milk cool for hours on end and they can hold several bottles at once.

But, there are endless options out there, so finding the right one for you can be overwhelming if you aren’t sure what to look for.

So, we’ve done the work for you– here are 8 of the best breast milk cooler bags that are available today!

Related: Pumping at Work: Tips for New Moms Returning to Work

Do I need a breast milk cooler bag?

There are about three main scenarios where you would need a breast milk cooler bag.

The first one:

You’re returning to work soon and will be pumping during the day.

If this is the case, you will need somewhere to store your expressed milk and then safely transport it home at the end of the workday. A cooler bag makes this process very easy!

The second scenario– Your child will be going to daycare and you need to send a day’s worth of bottles filled with breast milk for your baby. Pack them up in the right cooler bag, and you’re all set.

Finally, if you’re exclusively pumping, a cooler bag makes it super simple to take milk with you on the weekends or any time you’re away from home with your baby.

How long does breast milk last in a cooler bag?

With proper use of an ice pack, most cooler bags will be able to keep your breast milk safe for at least 4-8 hours.

However, this will depend on the bag you choose and the external temperature as well.

If the cooler bag is stored in a cooler environment, the breast milk may keep for longer. If it’s stored in a warmer environment, of course, it may not last as long.

It’s best to always check with your cooler bag’s manufacturer if you have questions about cooling time.

Things to consider before buying a cooler bag for breast milk

Carrying capacity and size

The more breast milk you’ll need to store and transport, the bigger cooler bag you will need.

Some moms may only need a small, more compact cooler bag that can fit into a pumping or diaper bag.

Others may require a larger bag with more space for multiple bottles.

Another thing to consider is whether or not you will need to buy two bags– one for work and one for daycare. Or will one bag suffice?

The perfect cooler bag should also have enough space for an ice pack (unless it’s a freezable bag).

The type/size bottles you plan to use

The brand and size of bottles you plan to use also matter when you’re shopping for the best breast milk cooler bag.

Some bottle brands are taller than others, and some are wider and shorter.

You’ll see that many of the cooler bags are better suited for smaller bottles and may not fit the larger, taller 8 or 9-ounce bottles.

If you plan to use larger bottles, you will need to choose a cooler bag that’s tall enough to accommodate them.

Cooling time

The next consideration is cooling time.

How many hours will your cooler bag need to keep your breast milk cool?

Not all cooler bags are created equal in this regard.

Some coolers may keep your expressed milk cool for up to 8 hours, while others may only be able to handle up to 4 hours.


If you were hoping to find a breast milk cooler bag that looks a little more discreet, you’re in luck.

Several of the bags we’ve rounded up come in a variety of patterns that will blend in well with your other bags and accessories.

Additional storage

Finally, it’s a good idea to consider whether or not you will need any additional storage space.

Extra storage (like side pockets) is good to have in case you have other things you want to carry with you.

Luckily, many of these options do have extra storage pockets.

Best breast milk cooler bags

Without further ado, here are the best cooler bags for storing breast milk!


The Momojing Insulated Breast Milk Cooler Bag is a great choice overall for working moms who need to commute long distances.

It can store up to four 9-ounce baby bottles and is equipped with an ice pack to keep breast milk cold for up to 8 hours.

Also, the top handle unbuckles, so you can easily attach it to another bag or even the stroller if you take it with you while you’re out and about on the weekends.


  • Cools for up to 8 hours
  • Ice pack included
  • Holds up to four 9-ounce bottles
  • Top handle unbuckles
  • Small back pocket for extra items
  • Easy to clean


  • No shoulder strap


The Momcozy Insulated Baby Bottle Bag is roomy enough to carry up to 6 Dr. Brown’s bottles or 4 large 8-ounce bottles, making it perfect for daycare or pumping at work.

The handle also unbuckles so that you can easily attach it to another bag or wherever else if you need to.

Overall, this cooler bag gets the job done. The only downside if you will need to also purchase an ice pack because this is not included.


  • Holds up to four large 8-ounce bottles or 6 Dr. Brown’s
  • Top handle unbuckles
  • Small inside pocket
  • Easy to clean


  • No shoulder strap
  • Ice pack not included


The Sarah Wells Cold Gold Breast Milk Cooler Bag is aesthetically pleasing and is able to hold four 8-ounce bottles (or a glass Mason jar if you wish).

It’s available in several cute prints, so you should be able to find the perfect one that compliments your other bags.

Each bag also comes with a Sarah Wells ice pack to keep your breast milk cool for up to 8 hours, depending on the current temperature of the room.

If you also have a Sarah Wells breast pump bag, this cooler bag will conveniently fit inside or clip to your strap.


  • Holds up to four 8-ounce bottles
  • Cools for up to 8 hours
  • Includes ice pack
  • Top handle unbuckles
  • Includes ID sleeve
  • Small inside pocket
  • Extra storage pocket
  • Easy to clean


  • No shoulder strap


The Skip Hop Insulated Bottle Cooler Bag is an ideal option for moms who prefer a more compact bag and don’t need the extra storage space for 4+ bottles.

This bag will hold at least 2 large bottles (sometimes 3 depending on the type of bottle you use). For most pumping moms, it’s plenty big enough to store the milk you will be pumping at work.

This cooler bag also has two-way zippers. Being able to access the bag from either side is a nice touch.


  • Holds 2-3 large bottles (depending on the type)
  • Cools for up to 4 hours
  • Top handle unbuckles
  • Mesh storage pocket inside
  • Two-way zippers
  • Easy to clean


  • No shoulder strap
  • Does not include ice pack


The PackIt Freezable Baby Bottle Cooler is unique because all you need to do is stick the entire cooler bag (just fold it flat first!) in the freezer overnight– No ice packs required.

This freezable cooler bag will hold four 5-ounce bottles, although some moms said it holds up to six 6-ounce bottles.

As far as how long this bag will cool, it heavily depends on the external temp. However, one mom said her bag kept cool for 3 hours in 80-degree weather.


  • Holds four to six 5-ounce bottles
  • No ice packs needed
  • Clear front pocket for name tag, date, etc.
  • Easy to clean


  • No shoulder strap
  • Top handle does not unbuckle, so you will not be able to attrach the cooler bag to the stroller, other bags, etc.
  • Since the bag is short, it will not fit 8-ounce bottles


The Lekebaby Breast Milk Cooler Bag is a larger option for moms who work long hours and need to transport a lot of their liquid gold.

This cooler bag can store 12 or more 6-ounce milk storage bags or 6 Medela and Nuk bottles.

However, if you use Dr. Brown’s, you may not be able to squeeze the 8-ounce bottles due to their height.

If you are looking for a cooler bag that will keep your breast milk cool for several hours, this bag does it right by keeping your milk cool for up to 8 hours.


  • Can fit 12 or more 6-ounce storage bags or 6 bottles
  • Cools for up to 8 hours
  • Ice pack included
  • Includes shoulder strap
  • Bag opens from the top or the front
  • Front storage pocket
  • Easy to clean


  • Too short to fit 8-ounce Dr. Brown’s bottles without having a bulge on top


The Teamoy Double Breast Milk Cooler Bag is the perfect solution if you are needing a cooler bag that can hold several large bottles.

This two-compartment bag is spacious enough to fit six 9-ounce bottles while also providing plenty of space in the top compartment for lunch, snacks, drinks, or even extra baby items such as wipes, pacifiers, etc.

There’s also an included shoulder strap, so you have the option of carrying it by the small top handle or on the shoulder.


  • Can fit 6 large 9-ounce bottles
  • Cools for 4-6 hours, depending on the external temperature
  • Ice pack included
  • Includes shoulder strap
  • Includes an additional storage compartment on top
  • Front storage area with zipper
  • Mesh storage pockets on each side
  • Two-way zippers
  • Easy to clean


  • May feel bulkier to carry


The J.L. Childress 6 Bottle Cooler is a two-compartment breast milk cooler bag that comes with a reusable ice pack and a shoulder strap.

This bag can hold up to six 8-ounce bottles. If you have the shorter, wider bottles, you may be able to squeeze in four instead.

Use the upper compartment to store anything extra you need to carry along with you. This is great for daycare as you can toss in extras for your baby like bibs, extra clothes, etc.

You could also use the upper compartment to store a small breast pump if you wanted.


  • Can fit 6 large 8-ounce bottles
  • Ice pack included
  • Strap is long enough to carry on shoulder
  • Additional upper storage compartment
  • Easy to clean


  • If you don’t plan to use large bottles, the bottom compartment may not be weighed down enough. Sometimes this can make the bag harder to zip.

Whether you’re here because you’re a working mom or your child is in daycare, it’s important that you have a safe way to store and transport your breast milk.

If you’re looking for the best breast milk cooler bag, you can’t go wrong with any of these options!

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