You are currently viewing: Medela - Global
You can select an alternative Medela website in one of these countries:

Products Articles Medela Family Customer Voices Services
WHY REUSABLE BREAST MILK STORAGE BAGS?
  • 100% LeakproofDouble-seal closure

  • Reusable up to 500 times

  • Best for home use

  • Durable & Reusable – Made of food-grade platinum silicone without BPA, lasting up to 500 uses.
  • No Leaks – One-piece moulded design with double-seal closure.
  • Large Capacity – It holds 220ml (7oz), the largest in Medela’s breast milk storage range.
  • Self-Standing & Stackable – Self standing design makes one-handed filling easy and convenient. Resists up to 1.2kg of pressure for space-saving storage in the fridge or freezer.
  • Easy to Clean, 97% agree* –Wide opening, one-piece design helps with effortless cleaning by hand or in the dishwasher. *Consumer research Feb 2025, USA
  • ​​​Protects Nutrients – ​Leakproof and double-seal design, made from platinum silicone for better protection of the unique components naturally present in your precious breast milk​
  • Accurate Scale & Labelling Area – Helps track date, time, and milk quantity with engraved markings. Use a waterproof pen to mark it.
  • 2in1 storing Solution – Best for home-use - Easy-to-use, space saving bags to store breast milk in the fridge and occasionally in the freezer.

5 pack of Reusable Breast Milk Storage Bag

What are the key features and benefits of the Reusable Breast Milk Storage Bags?
Our Reusable Breast Milk Storage Bags are durable and leakproof bags that are best for home-use to store your freshly pumped breast milk in the fridge or freezer. They are made from platinum silicone and last up to 500 uses. The one-piece moulded design with a wide opening makes it very easy to clean by hand or even in the dishwasher. They have a large capacity of 220ml/ 7oz. With a self-standing design, they qualify for one-handed filling conveniently, and they are stackable with up to 5 filled bags on top of each other (max 1.2kg). In addition, the scale in the bags is accurate and there is a specific writing area to mark the amount and date. You can mark the moon or sun on the bag to identify the time of day the milk was pumped. Ensure you use a waterproof pen and write in the dedicated labelling area. This allows easy wash off of ink and relabelling.

Are Reusable Breast Milk Storage Bags truly reusable?

Yes! Unlike disposable breast milk storage bags, these reusable bags are made from high-quality, food-grade platinum silicone, ensuring durability and multiple uses. Each bag is designed to withstand up to 500 uses. The one-piece design ensures you won`t lose any parts, and the marking areas can be labelled with a permanent waterproof pen that wipes off easily. The wide opening allows easy cleaning, whether by hand or in the dishwasher.

Should I choose reusable storage bags, disposable bags, or storage bottles?

Each storage option offers unique advantages, depending on a mom’s needs.     
Reusable storage bags are perfect for moms who pump regularly, especially with in-bra pumps. Best for home-use, they offer leakproof, space-saving storage and can be reused up to 500 times. Their flat-freezing, self-standing design makes filling and organising effortless.
Disposable breast milk storage bags offer convenience for breastfeeding moms who need a quick, hygienic solution without the need for cleaning. They come pre-sanitized and are perfect for moms who pump every day and want to build up breast milk storage. They are fully recyclable.
Storage bottles are ideal for frequent pumping directly into the bottle and storing in the fridge. While they are freezer-safe if needed, they are best suited for refrigeration.
The best choice depends on storage habits, convenience, and material preferences.

Are the reusable storage bags leakproof? 

Our Reusable Breast Milk Storage Bags are leakproof. They are made of durable platinum silicone in a one-piece mould. Make sure to remove excess air from the bag and close the bag securely with the double seal closure at the top. Pinch edges securely to ensure full closing.

Can the storage bags be frozen flat? 

The Reusable Breast Milk Storage Bags allow for flat freezing. By removing as much air as possible before closing the bag, you can effectively store your pumped breast milk. Ensure you are not storing more than 5 unfrozen bags on top of each other to avoid excess pressure. Bags can withstand 1.2kg of pressure.

Is the scale correct on the bags?

Yes, the scale is correct. The scale of our Reusable Breast Milk Storage Bags is more or less accurate, given the flexibility of the bag. Check the scale when the bag is still open to ensure measurement accuracy before storing.

How should the storage bags be organized and labelled?

Our Reusable Breast Milk Storage Bags can stand upright in the fridge or lay flat in the freezer. There is a dedicated labelling area on the bag for easy labelling, even when the bag is full. You should label the date and amount. The moon and the sun on the bag can help you identify the time of day the milk was pumped.

What does one-piece design mean?

Our Reusable Breast Milk Storage Bags are made in one-piece, which has lots of benefits. There is no extra screw top needed to close the bags due to the smart double-seal closure. Labeling can be done directly on the bag using a waterproof pen, which can be wiped off with soap during cleaning. This eliminates the need for extra tags. The bag is created as a single piece which also simplifies the cleaning process. The wide opening allows for easy access, and the absence of inner seams means there are no places for residues to get trapped.

What sizes do the Reusable Breast Milk Storage bags come in? 

Our Reusable Breast Milk Storage Bags can store up to 220ml/ 7oz of pumped breast milk.

What materials are the bags made from?

Our Reusable Breast Milk Storage Bags are made from durable food grade platinum silicone.

Are the storage bags safe for my baby?

Yes. All Medela personal-use breastfeeding products, such as the Reusable Breast Milk Storage Bags, are manufactured from food grade materials without BPA, BPS, PVC or phthalates.

Do the storage bags contain BPA?

No, the material is made without BPA and phthalates.

How often can I reuse the bags? 

Our Reusable Breast Milk Storage Bags can be reused up to 500 times. This means you can, in total, store 2,500 portions of freshly expressed breast milk by purchasing just one pack of these bags.

Can these bags be used with any breast pump? 

Our Reusable Breast Milk Storage Bags do not attach to breast pumps. You can pour your breast milk directly from any hands-free collection cup or collection bottle directly into the bag for storage. The convenient wide opening and self-standing feature make it easy to fill.

Can you use an adaptor with these bags and pump directly into them?

These bags are for pouring the milk from the hands-free collection cup or milk collection bottle directly into the bag for storage. These bags cannot be converted to fit the breast pump for direct pumping.

Is sterilization required for Reusable Breast Milk Storage Bags before use? How do I best clean the bags?

Prior to first use, wash your hands with soap and clean the bag following instructions: Clean the bag immediately after use to avoid dry up of milk residues and to prevent from growth of bacteria. Rinse the bag in cold running water. Clean the bag using hand hot water with detergent, gently wipe the opening with a cloth, take care not to damage the bag when using a brush. Alternatively, you can wash the bags in the dishwasher upside down on the top rack (65°C or 149 °F). You can sanitize using the Quick Clean™ Microwave Bags or by boiling for 10 minutes (100°C or 212 °F).

Are the storage bags sanitized or sterile?

No, you need to clean them before first use. Follow the instruction-for-use, please.

Storing, Freezing, Thawing:

asset_image

Can breast milk storage bags be reused?

Our Reusable Breast Milk Storage Bags are designed for up to 500 uses. 

How long can breast milk be stored in these bags?

As per recommended guidelines, breast milk can be stored in the freezer for up to 180 days (6 months) at -18° C or 0° F or in the fridge for up to 3 days at 4°C or 39°F. If you keep breast milk outside the fridge, do not store it for more than 4 hours.

Is it safe to store more than 220ml/ 7oz per bag? I have been filling them up to the rim.

We do not recommend filling the bag with more than 220ml/ 7oz. It may cause the bag to burst when frozen, as liquid expands naturally upon freezing.

Do breast milk storage bags expire?
The Medela Reusable Breast Milk Storage Bags do not have an expiration date.

What is the recommended method for thawing frozen breast milk?

You can place the bag in the fridge for about 12h to thaw gently, or place the bag with frozen milk in a bowl of warm (37°C or 99°F) water and warm until it reaches body temperature. 

Can breast milk be warmed up in storage bags?

You can warm the breast milk in the breast milk storage bags. We recommend placing the sealed bag in a bowl of warm water until it reaches body temperature (37°C or 99°F). You can use this method to gently thaw and warm the frozen breast milk or to warm breast milk from the fridge. Make sure you swirl the bag and do not shake it to help preserve the vital nutrients in the breast milk.

Can breast milk storage bags be warmed in a bottle warmer?

Our recommended warming method is a gentle warming in a bowl or similar with warm water (37°C or 99°F) while swirling the bag. We do not recommend using a bottle warmer as it may overheat the breast milk and damage vital nutrients. 

Features & Benefits
  • Durable & Reusable – Made of food-grade platinum silicone without BPA, lasting up to 500 uses.
  • No Leaks – One-piece moulded design with double-seal closure.
  • Large Capacity – It holds 220ml (7oz), the largest in Medela’s breast milk storage range.
  • Self-Standing & Stackable – Self standing design makes one-handed filling easy and convenient. Resists up to 1.2kg of pressure for space-saving storage in the fridge or freezer.
  • Easy to Clean, 97% agree* –Wide opening, one-piece design helps with effortless cleaning by hand or in the dishwasher. *Consumer research Feb 2025, USA
  • ​​​Protects Nutrients – ​Leakproof and double-seal design, made from platinum silicone for better protection of the unique components naturally present in your precious breast milk​
  • Accurate Scale & Labelling Area – Helps track date, time, and milk quantity with engraved markings. Use a waterproof pen to mark it.
  • 2in1 storing Solution – Best for home-use - Easy-to-use, space saving bags to store breast milk in the fridge and occasionally in the freezer.
What's included

5 pack of Reusable Breast Milk Storage Bag

FAQs

What are the key features and benefits of the Reusable Breast Milk Storage Bags?
Our Reusable Breast Milk Storage Bags are durable and leakproof bags that are best for home-use to store your freshly pumped breast milk in the fridge or freezer. They are made from platinum silicone and last up to 500 uses. The one-piece moulded design with a wide opening makes it very easy to clean by hand or even in the dishwasher. They have a large capacity of 220ml/ 7oz. With a self-standing design, they qualify for one-handed filling conveniently, and they are stackable with up to 5 filled bags on top of each other (max 1.2kg). In addition, the scale in the bags is accurate and there is a specific writing area to mark the amount and date. You can mark the moon or sun on the bag to identify the time of day the milk was pumped. Ensure you use a waterproof pen and write in the dedicated labelling area. This allows easy wash off of ink and relabelling.

Are Reusable Breast Milk Storage Bags truly reusable?

Yes! Unlike disposable breast milk storage bags, these reusable bags are made from high-quality, food-grade platinum silicone, ensuring durability and multiple uses. Each bag is designed to withstand up to 500 uses. The one-piece design ensures you won`t lose any parts, and the marking areas can be labelled with a permanent waterproof pen that wipes off easily. The wide opening allows easy cleaning, whether by hand or in the dishwasher.

Should I choose reusable storage bags, disposable bags, or storage bottles?

Each storage option offers unique advantages, depending on a mom’s needs.     
Reusable storage bags are perfect for moms who pump regularly, especially with in-bra pumps. Best for home-use, they offer leakproof, space-saving storage and can be reused up to 500 times. Their flat-freezing, self-standing design makes filling and organising effortless.
Disposable breast milk storage bags offer convenience for breastfeeding moms who need a quick, hygienic solution without the need for cleaning. They come pre-sanitized and are perfect for moms who pump every day and want to build up breast milk storage. They are fully recyclable.
Storage bottles are ideal for frequent pumping directly into the bottle and storing in the fridge. While they are freezer-safe if needed, they are best suited for refrigeration.
The best choice depends on storage habits, convenience, and material preferences.

Are the reusable storage bags leakproof? 

Our Reusable Breast Milk Storage Bags are leakproof. They are made of durable platinum silicone in a one-piece mould. Make sure to remove excess air from the bag and close the bag securely with the double seal closure at the top. Pinch edges securely to ensure full closing.

Can the storage bags be frozen flat? 

The Reusable Breast Milk Storage Bags allow for flat freezing. By removing as much air as possible before closing the bag, you can effectively store your pumped breast milk. Ensure you are not storing more than 5 unfrozen bags on top of each other to avoid excess pressure. Bags can withstand 1.2kg of pressure.

Is the scale correct on the bags?

Yes, the scale is correct. The scale of our Reusable Breast Milk Storage Bags is more or less accurate, given the flexibility of the bag. Check the scale when the bag is still open to ensure measurement accuracy before storing.

How should the storage bags be organized and labelled?

Our Reusable Breast Milk Storage Bags can stand upright in the fridge or lay flat in the freezer. There is a dedicated labelling area on the bag for easy labelling, even when the bag is full. You should label the date and amount. The moon and the sun on the bag can help you identify the time of day the milk was pumped.

What does one-piece design mean?

Our Reusable Breast Milk Storage Bags are made in one-piece, which has lots of benefits. There is no extra screw top needed to close the bags due to the smart double-seal closure. Labeling can be done directly on the bag using a waterproof pen, which can be wiped off with soap during cleaning. This eliminates the need for extra tags. The bag is created as a single piece which also simplifies the cleaning process. The wide opening allows for easy access, and the absence of inner seams means there are no places for residues to get trapped.

What sizes do the Reusable Breast Milk Storage bags come in? 

Our Reusable Breast Milk Storage Bags can store up to 220ml/ 7oz of pumped breast milk.

What materials are the bags made from?

Our Reusable Breast Milk Storage Bags are made from durable food grade platinum silicone.

Are the storage bags safe for my baby?

Yes. All Medela personal-use breastfeeding products, such as the Reusable Breast Milk Storage Bags, are manufactured from food grade materials without BPA, BPS, PVC or phthalates.

Do the storage bags contain BPA?

No, the material is made without BPA and phthalates.

How often can I reuse the bags? 

Our Reusable Breast Milk Storage Bags can be reused up to 500 times. This means you can, in total, store 2,500 portions of freshly expressed breast milk by purchasing just one pack of these bags.

Can these bags be used with any breast pump? 

Our Reusable Breast Milk Storage Bags do not attach to breast pumps. You can pour your breast milk directly from any hands-free collection cup or collection bottle directly into the bag for storage. The convenient wide opening and self-standing feature make it easy to fill.

Can you use an adaptor with these bags and pump directly into them?

These bags are for pouring the milk from the hands-free collection cup or milk collection bottle directly into the bag for storage. These bags cannot be converted to fit the breast pump for direct pumping.

Is sterilization required for Reusable Breast Milk Storage Bags before use? How do I best clean the bags?

Prior to first use, wash your hands with soap and clean the bag following instructions: Clean the bag immediately after use to avoid dry up of milk residues and to prevent from growth of bacteria. Rinse the bag in cold running water. Clean the bag using hand hot water with detergent, gently wipe the opening with a cloth, take care not to damage the bag when using a brush. Alternatively, you can wash the bags in the dishwasher upside down on the top rack (65°C or 149 °F). You can sanitize using the Quick Clean™ Microwave Bags or by boiling for 10 minutes (100°C or 212 °F).

Are the storage bags sanitized or sterile?

No, you need to clean them before first use. Follow the instruction-for-use, please.

Storing, Freezing, Thawing:

asset_image

Can breast milk storage bags be reused?

Our Reusable Breast Milk Storage Bags are designed for up to 500 uses. 

How long can breast milk be stored in these bags?

As per recommended guidelines, breast milk can be stored in the freezer for up to 180 days (6 months) at -18° C or 0° F or in the fridge for up to 3 days at 4°C or 39°F. If you keep breast milk outside the fridge, do not store it for more than 4 hours.

Is it safe to store more than 220ml/ 7oz per bag? I have been filling them up to the rim.

We do not recommend filling the bag with more than 220ml/ 7oz. It may cause the bag to burst when frozen, as liquid expands naturally upon freezing.

Do breast milk storage bags expire?
The Medela Reusable Breast Milk Storage Bags do not have an expiration date.

What is the recommended method for thawing frozen breast milk?

You can place the bag in the fridge for about 12h to thaw gently, or place the bag with frozen milk in a bowl of warm (37°C or 99°F) water and warm until it reaches body temperature. 

Can breast milk be warmed up in storage bags?

You can warm the breast milk in the breast milk storage bags. We recommend placing the sealed bag in a bowl of warm water until it reaches body temperature (37°C or 99°F). You can use this method to gently thaw and warm the frozen breast milk or to warm breast milk from the fridge. Make sure you swirl the bag and do not shake it to help preserve the vital nutrients in the breast milk.

Can breast milk storage bags be warmed in a bottle warmer?

Our recommended warming method is a gentle warming in a bowl or similar with warm water (37°C or 99°F) while swirling the bag. We do not recommend using a bottle warmer as it may overheat the breast milk and damage vital nutrients. 

Related Products
Medela Breast milk storage bottles 150ml with collars and discs, 3-pack
Bottles & bags

Breast milk storage bottles

Compatible with all Medela breast pumps storage, making it easy to pump and store using the same container. Medela's breast milk storage bottles are a perfect complement to your breastfeeding experience.

View product
Medela Swing Maxi™ double electric breast pump, Hands-free collection cups and tubing
Hands-free electricPumps

Swing Maxi™ Hands-free Electric Breast Pump

Experience Medela’s new hands-free solution for on the go – the Swing Maxi™ Hands-free electric pump for outmost convenience while multi-tasking.

View product
The Medela Ultra-breathable Nursing Pads have been developed for optimum air circulation.
Breast care

Ultra-breathable nursing pads

Designed for when you’re experiencing heavy breast leaking – especially soon after your baby’s birth – Medela’s ultra-absorbent disposable nursing pads keep you dry, comfortable and confident, both day and night.

View product
Medela Breast milk storage bottles 150ml with collars and discs, 3-pack
Bottles & bags

Breast milk storage bottles

Compatible with all Medela breast pumps storage, making it easy to pump and store using the same container. Medela's breast milk storage bottles are a perfect complement to your breastfeeding experience.

View product
Medela Swing Maxi™ double electric breast pump, Hands-free collection cups and tubing
Hands-free electricPumps

Swing Maxi™ Hands-free Electric Breast Pump

Experience Medela’s new hands-free solution for on the go – the Swing Maxi™ Hands-free electric pump for outmost convenience while multi-tasking.

View product
The Medela Ultra-breathable Nursing Pads have been developed for optimum air circulation.
Breast care

Ultra-breathable nursing pads

Designed for when you’re experiencing heavy breast leaking – especially soon after your baby’s birth – Medela’s ultra-absorbent disposable nursing pads keep you dry, comfortable and confident, both day and night.

View product
Medela Breast milk storage bottles 150ml with collars and discs, 3-pack
Bottles & bags

Breast milk storage bottles

Compatible with all Medela breast pumps storage, making it easy to pump and store using the same container. Medela's breast milk storage bottles are a perfect complement to your breastfeeding experience.

View product
Medela Swing Maxi™ double electric breast pump, Hands-free collection cups and tubing
Hands-free electricPumps

Swing Maxi™ Hands-free Electric Breast Pump

Experience Medela’s new hands-free solution for on the go – the Swing Maxi™ Hands-free electric pump for outmost convenience while multi-tasking.

View product
The Medela Ultra-breathable Nursing Pads have been developed for optimum air circulation.
Breast care

Ultra-breathable nursing pads

Designed for when you’re experiencing heavy breast leaking – especially soon after your baby’s birth – Medela’s ultra-absorbent disposable nursing pads keep you dry, comfortable and confident, both day and night.

View product
Medela Breast milk storage bottles 150ml with collars and discs, 3-pack
Bottles & bags

Breast milk storage bottles

Compatible with all Medela breast pumps storage, making it easy to pump and store using the same container. Medela's breast milk storage bottles are a perfect complement to your breastfeeding experience.

View product
Medela Swing Maxi™ double electric breast pump, Hands-free collection cups and tubing
Hands-free electricPumps

Swing Maxi™ Hands-free Electric Breast Pump

Experience Medela’s new hands-free solution for on the go – the Swing Maxi™ Hands-free electric pump for outmost convenience while multi-tasking.

View product
The Medela Ultra-breathable Nursing Pads have been developed for optimum air circulation.
Breast care

Ultra-breathable nursing pads

Designed for when you’re experiencing heavy breast leaking – especially soon after your baby’s birth – Medela’s ultra-absorbent disposable nursing pads keep you dry, comfortable and confident, both day and night.

View product
Related Articles

Articles that may be of interest

Medela breast milk bags stored upright in the refrigerator, flat in the freezer and thawing gently in warm water.
Pumping tips

How to store, freeze and thaw breast milk

  • Time to read: 6 min.
Read more
Illustration of the composition of breast milk and its nutrients in Medela breast milk bottles.
Power of breast milk

Breast milk composition: What’s in your breast milk?

  • Time to read: 6 min.
Read more
Woman with a Medela breast pump navigating through airport security with a carry-on bag
Pumping tips

Travel with your breast pump: Expressing on the go

  • Time to read: 5 min.
Read more
Medela breast milk bags stored upright in the refrigerator, flat in the freezer and thawing gently in warm water.
Pumping tips

How to store, freeze and thaw breast milk

  • Time to read: 6 min.
Read more
Illustration of the composition of breast milk and its nutrients in Medela breast milk bottles.
Power of breast milk

Breast milk composition: What’s in your breast milk?

  • Time to read: 6 min.
Read more
Woman with a Medela breast pump navigating through airport security with a carry-on bag
Pumping tips

Travel with your breast pump: Expressing on the go

  • Time to read: 5 min.
Read more
Medela breast milk bags stored upright in the refrigerator, flat in the freezer and thawing gently in warm water.
Pumping tips

How to store, freeze and thaw breast milk

  • Time to read: 6 min.
Read more
Illustration of the composition of breast milk and its nutrients in Medela breast milk bottles.
Power of breast milk

Breast milk composition: What’s in your breast milk?

  • Time to read: 6 min.
Read more
Woman with a Medela breast pump navigating through airport security with a carry-on bag
Pumping tips

Travel with your breast pump: Expressing on the go

  • Time to read: 5 min.
Read more
Medela breast milk bags stored upright in the refrigerator, flat in the freezer and thawing gently in warm water.
Pumping tips

How to store, freeze and thaw breast milk

  • Time to read: 6 min.
Read more
Illustration of the composition of breast milk and its nutrients in Medela breast milk bottles.
Power of breast milk

Breast milk composition: What’s in your breast milk?

  • Time to read: 6 min.
Read more
Woman with a Medela breast pump navigating through airport security with a carry-on bag
Pumping tips

Travel with your breast pump: Expressing on the go

  • Time to read: 5 min.
Read more

For the best experience, we advise you to visit your local Medela site.

It looks like you are currently located in Global.
You are currently viewing Medela’s Global website.

Please choose: