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21 mm Inserts

Rated 4.9 out of 5
Based on 33 reviews

Regular price $ 12.99 Sale


Set of 2 - For Silicone Collection Cups

21 mm Legendairy Milk Inserts are exclusively designed to fit right inside your Silicone Collection Cups as well as most 24 mm traditional plastic breast shields. 

ALL SALES FINAL. BREAST PUMP AND KIT NOT INCLUDED.

Compatibility: 21 mm Legendairy Milk Inserts are compatible with both the Silicone Collection Cups and most traditional 24/25 mm plastic breast shields aka flanges. 

Includes: Pack of two (2) 21mm Legendairy Milk Inserts

Caring and Cleaning Guidelines:

  • Sterilize before first use by submerging the inserts in a deep and wide pot of boiling water for 3-5 minutes. The inserts should be fully submerged in water and not touch the bottom or sides of the pot. Do not sterilize and avoid using high heat after initial sterilization.
  • Hand wash in warm soapy water then rinse clean after subsequent uses. Using cold sterilization or UV sterilization is also permissible.
  • Do not wash inserts in the dishwasher. 
  • Replace every 3 weeks, depending on the frequency of use.

Warning! Choking Hazard - keep away from infants and small children. Replace parts right away if they become torn or damaged.

Key Benefits

  • Reduce the diameter of your breast shield for better output
  • Obtain an optimal breast shield fit
  • Minimize pain and discomfort caused by an improper breast shield size
  • Make a better seal
This product is
average rating 4.9 out of 5
Based on 33 reviews
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Rated 4 out of 5
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33 Reviews
Reviewed by Mariana T.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

They can be modified to work with Elvie Stride flanges

I absolutely love these flanges. I used them on my spectra and willow flanges. I just bought the elvie stride and I cut these very slightly so they wouldn’t cover the hole that collects milk. It has made pumping a lot more comfortable with the stride.

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Reviewed by Mariana T.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

I use them with regular flanges as well

They are perfect fits for the silicone cups and makes it super comfortable. But these inserts can also be used in flanges as well! They don’t fit in the 24mm but they do fit in the 28mm. They are a little too small for the 28 but they make pumping with regular flanges extremely comfortable. I do see an increase in output as well!

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Reviewed by Chelsea P.
Verified Reviewer
I recommend this product
Rated 5 out of 5
Review posted

21 mm Inserts

I purchased these with the silicone collection cups and they have made pumping so much more comfortable! I have been primarily breastfeeding while on maternity leave, but has been trying to pump a couple times a week to get used to it and make sure my baby would take a bottle. I’m going back to work in a few weeks so I have been ramping up my pumping sessions, and I hated how hard the flanges were that came with my spectra pump. I tried these inserts with those flanges just to see if it helped, and it totally did! They fit the flanges perfectly and made them so much more comfortable. I feel like I got better output too!

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Reviewed by Brinne
Verified Reviewer
I recommend this product
Rated 5 out of 5
Review posted

Must have!

I bought these inserts with my legendairy milk cups. They work well with those, and I find the sizing to be very accurate.

I have elastic nipples, and I generally have to use a silicone flange when I pump. I have tried other inserts inside hard plastic flanges without much success. I decided to give these a try inside a 27mm medela plastic flange, and they worked really well! It stopped my nipple tissue from pulling down the flange and expanding to the size of it. It also made them much more comfortable, and I was able to get my same output within the same amount of time. I like that these are thicker and more structured than another popular brand of silicone insert without being too hard or stiff. They’re definitely the best silicone insert on the market!

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Reviewed by Erin R.
Verified Reviewer
I recommend this product
Rated 5 out of 5
Review posted

Super comfortable!

I received these with the Legendairy Milk silicone collection cups, but I also use them inside my Medela 27mm hard plastic flanges. After I gave birth to my baby, the lactation nurse I met gave me these flanges to use when pumping, but I found them painful to use. I thought, "Maybe I just have to get use to it?" but after a few weeks, it didn't get any better. I measured my nipples and realized the flanges were too big for me. I tried a different brand of inserts but they were much smaller, they slipped around inside of the flanges and made me experience decreased suction. These inserts fit well inside the 27mm flanges and make my pumping experience so much more comfortable. No slipping around, no decreased suction.

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