How can i buy the 24mm bags, as the 27mm does not fit my pump correctly and waste milk?

I’m pretty sure there is only one size for all flange sizes. Although I have seen bags that say they are for willow 1&2 generations but I have 3 and haven’t seen a different size to go with each flange.

Will the pump work without the bag attached - I just bought a series 1 because I could not afford 500.00?

If you have the reusable flange than yes it will work without the bags but I have the series 3 so I don’t know about the series 1 and I don’t know if They have a reusable flange that could be purchased instead of bags. As long as you have the correct pieces you don’t have to use the bags for series 3. But you’ll have to check with the one you have. Hope this helps.

If I have a low supply can I put the bags in the fridge in between sessions and use the same bag for the next pumping session ?

No, because you would be mixing the milk at different temperatures. This is one of the only real drawbacks for using the willow pumping bags. For a low supply, I would recommend their reusable storage containers. That way you could pump a little, pour it into a bag or container, and refrigerate it and then on your next pumping session do the same. Then mix your cold containers together to freeze if you want.

Willow Pump Spill-Proof Breast Milk Bags, 48 Count | Holds 4 oz. Per Bag | Self-Sealing Storage Bags, Recyclable & BPA Free | Breast Feeding Essential for The Willow Pump

Willow Pump Spill-Proof Breast Milk Bags, 48 Count | Holds 4 oz. Per Bag | Self-Sealing Storage Bags, Recyclable & BPA Free | Breast Feeding Essential for The Willow Pump

Product ID: 733633977

Secure Transaction

Details

Brand
Willow
Capacity
113 g
Color
A71
Is Dishwasher Safe
No
Item Weight
0.42 Pounds
Manufacturer
Willow

🍼4 oz capacity per bag

🔒Self-sealing spill-proof design

♻️Recyclable & eco-friendly

Description

🍼 Secure your milk, secure your peace of mind.

BULK PACK CONVENIENCE - 48 bags per pack to keep you stocked and stress-free on the go.
GENEROUS 4 OZ CAPACITY - Ideal size to store just the right amount of milk for every feeding.
ECO CONSCIOUS BPA FREE - Safe for baby and planet, made from recyclable, BPA-free materials.
PERFECT FIT FOR WILLOW PUMP - Seamlessly compatible with your Willow pump for hassle-free milk collection.
SPILL PROOF SELF SEALING BAGS - Lock in freshness and avoid leaks with secure, easy-to-use seals.

Willow Pump Spill-Proof Breast Milk Bags offer 48 BPA-free, recyclable bags designed specifically for the Willow pump. Each bag holds up to 4 oz of milk and features a self-sealing, spill-proof design to keep milk fresh and secure. Trusted by thousands of moms, these bags combine convenience, safety, and eco-consciousness in one essential breastfeeding accessory.

Specifications

ASIN	B084YX6FTJ
ASIN	B084YX6FTJ
Brand Name	Willow
Capacity	113 g
Color	A71
Customer Reviews	4.6 4.6 out of 5 stars (3,324)
Is Discontinued By Manufacturer	No
Is the item dishwasher safe?	No
Item Weight	0.42 Pounds
Item model number	B4825
Manufacturer	Willow
Manufacturer	Willow
Manufacturer Part Number	B4825
Model Number	B4825
Number of Items	1
Product Dimensions	24.64 x 18.54 x 3.81 cm; 190.51 g
Size	48 Bags
UPC	768480505551 858298006255

Reviews

M**A

Perfect for willow breast pump. Price is about the same as on the willow site but the shipping is faster and free.

3.03.2026

C**Y

Will always recommend this pump for new moms

2.03.2026

A**J

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!

3.01.2026

T**S

Some tend to leak at the connection port- not a ton, but enough to be annoying and get everything wet.

29.07.2025

S**M

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

13.08.2025

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews

23753 kr

Duties & taxes incl.

Icelandstore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews