




Product description


Pump on the go
Each bag holds up to 4 oz of milk. After each session, easily store your milk in your fridge or freezer. Each bag is single-use, BPA-free, and recyclable.

Ultimate leak-proof pumping
Willow is the only pump with true, spill-proof mobility for pumping moms! Our proprietary, patented technology creates continuous suction, similar to a baby’s latch.

Essential to Willow 3.0
Pump and store milk in the same collection and storage bag. Each milk bag has a one-way valve so milk goes in and doesn’t come out.

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Customer Reviews
4.4 out of 5 stars 3,458
4.6 out of 5 stars 3,509
4.0 out of 5 stars 2,222
4.4 out of 5 stars 3,458
4.4 out of 5 stars 3,458
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Price
$499.99$499.99 $29.99$29.99 $69.99$69.99 $39.99$39.99 $34.99$34.99
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Sizes Available
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21mm, 24mm, 27mm 21mm, 24mm, 27mm no data
15mm, 17mm, 19mm
What’s Included
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48 Milk Bags 2 Milk Containers 2 Flanges 2 Flextubes 2 Inserts
Accessory for Willow 360 Pump
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FSA/HSA Eligible
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Mobility
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360° 190° no data
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FAQS
Q: How many ounces of milk does each milk bag hold?
Willow’s spill-proof milk bags hold 4 oz of milk each.
Q: Can I reuse the milk bags?
Willow milk bags are single use and should not be reused. Our milk bags have a one-way valve so milk comes in and doesn’t come out. They are already sealed when you remove them from the pump so you can pump and store in the same bag without transferring your milk. Store your milk in the fridge or freezer until you’re ready to use it.
Q: Can I pump with both the milk bags and the reusable containers?
Yes, absolutely! Switch back and forth and choose the best option for each pumping situation.

At Willow, we believe Moms deserve a better world.
We knew there had to be a better way to pump—so we invented one. Willow’s hands-free, cord-free, wearable breast pumps free you from the constraints of traditional breast pumps and let you live your life untethered.
Willow earned a spot on Time’s 25 Best Inventions, and was selected by Women’s Health as a Best New Tech Gadget for Women. Babylist has recognized Willow as a Best Breast Pump, and the Bump selected Willow as its Best Hands-Free Breast Pump.
Willow Breast Milk Storage Bags: Completely leak proof and self sealing; Willow Pump Spill Proof Breast Milk Bags offer the pumping convenience you deserve; For use with Willow 360 or 3.0 Wearable Breast Pump
Leak Proof Pumping: Patented technology offers 360 degrees of leak proof mobility for breast pumping in any position with the Willow Breast Pump, Generation 3, 2, 1
48 Count of Willow Pump Bags: Totally hygienic to keep milk safe for your baby; recyclable, and BPA free
Holds up to 4 ounces per Bag: Pump 4 ounces at a time, or 8 ounces when double pumping; Use the Willow 3.0 app to track output in real time
Limited Warranty: 90 day limited manufacturer’s warranty; Made in the USA
8 reviews for Willow – 360 Pump Spill-Proof Breast Milk Bags – 24 Ct – Holds 4 oz. Per Self-Sealing Storage Bag – Compatible with Willow 360 or 3.0 Wearable Hands Free Breast Pump
Add a review
$29.99
Sarah Holmes –
Good value
These bags are great- typically faster shipping than the willow website BUT do be mindful of the quantity. I always order 48 but for some reason I accidentally ordered the 24…. Which is the same price as 48 😑
Marissa –
Free shipping over on the willow website
Perfect for willow breast pump. Price is about the same as on the willow site but the shipping is faster and free.
Carolyn Lively –
Willow 360 pump.
Will always recommend this pump for new moms
sam –
Convenient and leak proof
I have the willow 360 pump and it is amazing. It really is leak proof both during pumping use with the pumps and the bags. I bartend and use this while I work. The pumps are a bit noticeable and bulky. But other than that they work amazing. And these pump bags are awesome for when you are busy and or on the go. Would define recommend the willow 360 and the pump bags that go with it
AJ –
Sturdy!!
These bags are so sturdy!! You don’t have to worry about spilling your milk when transferring because it has such a slow flow almost like it’s designed to reduce as much spillage as possible. I wish I could buy them in bulk! Other than that, I love these bags and they stay in rotation for my willow 360!
Tara S –
Leakage
Some tend to leak at the connection port- not a ton, but enough to be annoying and get everything wet.
Fancy –
Tip: crinkle them before you put them in
These are great for the Willow 3. If you crinkle them before you put them into the case assembly it will be of great help. I watched a video in which you can use a fork to empty them out through the valve, put it in the fridge and reuse them again.They are a bit expensive but worth it if you want a 360 degree suction.
Rachel J –
Prefect for working moms and busy moms
Used these bags for my Willow 3.0 wearable pump. These are hsa eligible and very handy for on the go. I started using them at work as I pumped twice during my work shift and this allowed me to reduce the amount of items I needed to wash. Also for sanitary for store breast milk in the fridge. I just put the bags in a lunch bag in the fridge. Also there’s a spot to write the date/time. After a while struggling at home with the traditional pump I switched to using these bags at home too. Allowed me to move in 360 degrees without leakage. Otherwise, if you use the containers instead you cannot bend over.