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8 best breast milk storage bags to buy in 2021

Breast milk storage bags are a great way to store that precious liquid gold ready for when baby has a rumbling tum and mum isn’t around.

By Laura Cooke | Last updated Nov 24, 2021

three breast milk storage bags

There are a number of breastfeeding accessories that are high on the must-have list for new mums, such as breast pumps, breast pads, nipple creams and breastfeeding clothes or covers.

But what about the humble breast milk storage bag? These little bags can be a huge help when baby arrives and you’re trying to get your head around those wonderful, and messy, first few months.

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What are breast milk storage bags?

Breast milk storage bags are sterile bags which allow you to store your milk in the fridge or freezer to be taken out and used when needed. This means that someone else can feed your baby using your own milk while you go out (or nap). Breast milk storage bags are made from special material and are not the same as your average food bag. Breast milk storage bags are strong and seal tightly to prevent any leaks.

But all breast milk storage bags are not created equal, so we’ve trawled expert review sites and the Mumsnet forums to find out which bags our users recommend and have come up with our top picks below.

Here are the best breast milk storage bags to buy in 2021.

1. Best overall breast milk storage bags: Lansinoh Breast Milk Storage Bags

Lansinoh Breast Milk Storage Bags

Price: £7.50 | Buy now from Amazon

“I’m currently using Lansinoh Breast Milk Bags and have zero problems!” Piccalily19

“I always used the Lansinoh ones. Never had any issues with them or anything. I just used to express into a bottle and then pour it into the bag.” Camnico

“Lansinoh here too. I found them less fiddly to open/seal etc so were better value in the long run.” Passthebiscuit

Lansinoh is a clear winner when it comes to breast milk storage bags. Mumsnetters rate these pre-sterilised bags highly for their secure tear-away top and double seals which prevent leaking. The bags can be stored flat in the freezer or left to stand in the fridge as the bottom expands. And the best bit is you can pump straight into the bag, saving time and extra washing up.

Pros

  • Can pump directly into the bag
  • Affordable

Cons

  • Expanding the bottom can affect measurement accuracy

Key specs

  • Capacity: 180ml
  • Number of bags: 50

2. Best budget breast milk storage bag: Medela Breast Milk Storage Bags

Medela Breast Milk Storage Bags

Price: £5.99 | Buy now from Amazon

“...milk storage bags from Medela on Amazon. You've all motivated me!”  PurplePansy05

If you’re looking for affordable breast milk storage bags, without compromising on quality, then the Medela Breast Milk Storage Bags are an excellent choice.

Available in packs of 25 and 50, the bags are double sealed and can be expanded for easy storage in the fridge or freezer. They even come with a handy transport pouch which can be used to keep bags organised. What’s not to like?

Pros

  • Affordable
  • Comes with transport pouch
  • Can be laid flat

Cons

  • Cannot pump directly into bags

Key specs

  • Capacity: 180ml
  • Number of bags: 50

3. Best reusable breast milk storage bags: Haakaa Silicone Breast Milk Storage Bags

Haakaa Silicone Breast Milk Storage Bags

Price: £23.74 | Buy now from Amazon

If you don’t like the idea of single-use breast milk storage bags, then Haakaa has come up with the ideal product for eco-conscious parents.

These breast milk storage bags are made from 100% food grade silicone that is BPA-, PVC- and phthalate-free and are suitable for storing in the fridge and freezer. The silicone travel strap makes it easy to carry the bag, which folds up and can be bound with the travel strap after use. And when your little one is bigger, the bags can then be repurposed as juice pouches.

Pros

  • Reusable
  • Large capacity
  • You can warm the milk directly in the bag

Cons

  • Must be washed and sterilised before each use

Key specs

  • Capacity: 260ml
  • Number of bags: 2

4. Best direct-from-pump breast milk storage bag: Tommee Tippee Express and Go Pouches

Tommee Tippee Express and Go Pouches

Price: £6.99 | Buy now from Amazon

For busy parents who want to streamline the pumping process, we rate the Tommee Tippee Express and Go Pouches.

These pre-sterilised bags can be attached to any breast pump and, after expressing, a handy screw-top lid will prevent any spillages.

If you want to get super organised, a Tommee Tippee Express and Go Storage Case can keep up to 12 bags neatly stored in your fridge or freezer.

Pros

  • Secure lid
  • Compatible with multiple brands of breast pump

Cons

Key specs

  • Capacity: 180ml
  • Number of bags: 20

5. Best breast milk storage bag for the freezer: Boots Breast Milk Storage Bags

Boots Breast Milk Storage Bags

Price: £7.49 | Buy now from Boots

“Having tried all the key brands, my personal preference was the Boots own brand. Easy to fill, easy to freeze, ease to use. I found issues with all others, either spillage when filling or not sealing or such like.” Dragonfree

Boots’ Breast Milk Storage Bags are double-walled for extra strength and sealed with a handy zip closure to prevent any of that precious liquid gold leaking in the fridge or freezer. The bottom of the bag can also be expanded for upright storage.

Just a word of warning - Boots say the measurements on the side of the bag are for ‘guidance only,’ so best to record an accurate measurement with the bottle you are expressing into.

Pros

  • Strong bags to prevent leaks
  • Zip closure

Cons

  • Measurements not accurate
  • More pricey than other brands in terms of price per bag

Key specs

  • Capacity: 150ml
  • Number of bags: 30

6. Best easy-store breast milk storage bag: nanobébé Breast Milk Storage Bags

nanobébé Breast Milk Storage Bags

Price: £9.99 | Buy now from Amazon

For those who love a tidy fridge or freezer, nanobébé have come up with the ideal storage solution. These stackable bags take up minimal space and go perfectly with the Béaba nanobébé Storage Box which can be used as a handy dispenser.

The bags are extra thick and come with a double zip, which means that they won’t break or split. And, at 50 bags for less than a tenner, we think they are great value too.

Pros

  • Defrost and warm more quickly than other brands
  • Easy to store
  • Excellent value

Cons

  • Don’t stand upright
  • Storage box is an extra expense

Key specs

  • Capacity: 150ml
  • Number of bags: 50

7. Best oversized breast milk storage bag: Tommee Tippee Breast Milk Storage Bags

Tommee Tippee Breast Milk Storage Bags

Price: £5.99 | Buy now from Amazon

If you produce large volumes of milk and need a larger bag to store it all in, then Tommee Tippee has got you covered.

At 350ml, these bags are almost double the size of most of the other breast milk storage bags on our list. They can be laid flat or expanded for convenient storage in the fridge or freezer and have a double seal to prevent leaking. One word of warning though - the seals can be a bit stiff to open. Open with care to avoid splitting the bag.

Pros

  • Great for large volumes of milk
  • Good value

Cons

  • Seal can be stiff to open

Key specs

  • Capacity: 350ml
  • Number of bags: 36

8. Best breast milk storage bag for the fridge: Philips Avent Breast Milk Storage Bags

Philips Avent Breast Milk Storage Bags

Price: £11.22 | Buy now from Amazon

These pre-sterilised bags from Philips Avent are sturdy, easy to use and reliable, so you don’t have to worry about any milky leakages in your fridge. They also come with a good-sized label to jot down the date and milk volume before storage.

These aren’t the cheapest single-use breast milk storage bags around, but you may feel it’s worth paying a bit extra for a sturdier bag.

Pros

  • Strong
  • Easy to use

Cons

  • Pricey

Key specs

  • Capacity: 180ml
  • Number of bags: 25

Do you need breast milk storage bags?

Most breastfeeding mums consider breast milk storage bags to be an essential purchase. If you’re due to go back to work while you’re still nursing, or if you just want to go out for a child-free evening, then expressing your milk gives you the freedom to do so while making sure your little one doesn’t miss out. If you are exclusively breastfeeding, expressing milk gives your partner a chance to feed the baby, making them feel more involved and giving you the chance for a much-needed rest.

Most milk storage bags are pre-sterilised, but if you favour a reusable option, make sure you wash it thoroughly and sterilise before every use.

According to the NHS, breast milk storage bags can be kept in the fridge for up to eight days and in the freezer for up to six months, providing the temperature is low enough. Defrosted milk should be used as soon as possible and within 24 hours. Always remember to put the date on the label before storing your breast milk.

If you’re going to keep your breast milk in the freezer, don’t fill the bag all the way to the top. This is because liquid expands when frozen and this may cause the bag to split.

It may be worth freezing smaller amounts of milk in separate bags rather than defrosting one big bag only to find that your baby isn’t that hungry after all. While there’s nothing worse than having to see all that lovely white stuff going down the drain, any leftover milk should always be thrown out

How do I choose the best breast milk storage bag?

There are a number of things you should consider when buying breast milk storage bags.

  • Volume: Is a standard 180ml bag going to be big enough? If you overproduce milk, a larger sized bag, i.e 350ml, would be a sensible choice.
  • Storage options: If you’re planning to store your breast milk bags in the freezer, make sure the bags you buy can be safely stored there. Don’t put non-freezable breast milk storage bags in the freezer as this could also lead to splitting and wasted milk.Also consider whether you want to purchase a special box or sorter to keep your bags neat and tidy.
  • Compatibility: If you want to pump directly into the bag, check that the bags you buy are compatible with your breast pump.
  • Price: Breast milk storage bags vary in price. It’s always worth shopping around before committing to a purchase.

How many breast milk storage bags do I need?

It depends. If you’re going back to work and need to build up a good supply of milk, you may want to invest in more bags than if you are just keeping some in stock for the odd night out.

As a guide, exclusively breastfed babies take in an average of 750ml of milk per day between the ages of one and six months - the equivalent or just over four 180ml breast milk storage bags. But all babies are different and a typical range of milk intake is somewhere between 570ml and 900ml per day.

How soon does breast milk need to be frozen?

Experts recommend freezing breast milk within three days if stored in the fridge beforehand.

Can I store breast milk from the same day in the same bag?

Yes you can, but not if it has been freshly pumped and is still warm at body temperature. To add your most recently pumped fresh milk to refrigerated milk pumped on the same day, you need to cool it down first.

Can I pump straight into a bag?

It depends on which bag you buy. Of the products on our list, the Lansinoh Breast Milk Storage Bags and Tommee Tippee Express and Go Pouches can be attached directly to a breast pump. But always check that the bag is compatible with your pump before committing to a purchase.

Which breast milk storage bag is best?

Mumsnetters love the Lansinoh Breast Milk Storage Bags for being easy to use and leakproof. And the best bit is you can express directly into the bags themselves.

How we chose our recommendations

We scoured Mumsnet forums to find out which breast milk storage bags our users rate highly - and which ones they weren’t impressed by.

We also consulted consumer watchdogs and took note of what they looked for in breast milk storage bags and which brands they were recommending to their readers.

Finally, we collated all that information and then looked at other online reviews to see which breast milk storage bags had received the best recommendations.

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Why you should trust us

We work hard to provide unbiased, independent advice you can trust. We do sometimes earn revenue through affiliate (click-to-buy) links in our articles. This helps us fund more helpful articles like this one.