Milkbar Advanced Flow All-In-One Inserts


Our inserts are a cost effective option should you be unsure of what size you require or if you wish to replace your silicone piece frequently.

These replacement inserts for our All-In-One Kits come in sizes 21, 25 and 29mm. They include only the silicone cushion (sold singularly), and they fit into the all-in-one suction kit only. 

*Please ensure you have the correct insert for your suction kit before placing your order as these cannot be returned for hygiene reasons. If you are looking for inserts that are compatible with the suction kits included with our breast pumps please click here for the Original Suction Kit Inserts

Sizing is important when it comes to comfort and effectiveness during pumping. While we try to provide the most 'common' sizes with the breast pumps, sometimes a different size is required.

For a quick ruler guide Download our Suction Kit Sizing Guide here. This can be printed and used to assist you find your best fit.

Signs you might need a larger size:

  • You are unable to centre your nipple i.e have it inside the tunnel without it touching the sides
  • You feel your nipple is uncomfortable and rubbing against the side of the nipple tunnel during pumping
  • Your nipple is unable to move freely with the pumping motion
  • Your nipple is being strongly compressed by the 3 phase motion to a feeling of discomfort or pinching

Signs you might need a smaller size:

  • An excessive amount of your areola is being drawn into the nipple tunnel
  • You experience a painful tugging feeling
  • Your nipple is reaching the end of the nipple tunnel while pumping
  • You can hear air moving or 'sucking' inside the nipple tunnel
  • You are not experiencing compression of the nipple with the 3 phase motion
Sizing Guidelines
We recommend having 2-4mm of space surrounding your entire nipple for optimal fit. You can find your size by measuring the diameter of the base of your nipple, then adding 4-6mm to find the nearest size, if between sizes, it is recommended to go for the larger size.


15mm diameter base of nipple, add 4-6mm, nearest = 21mm

20mm diameter base of nipple, add 4-6mm, nearest = 25mm

23mm diameter base of nipple, add 4-6mm, nearest = 29mm 

Customer Reviews
5.0 Based on 4 Reviews
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
  • fumbling
  • ease
  • breeze
  • flanges
  • part
New Zealand New Zealand
I recommend this product
great accessory

The all in one part makes midnight cleaning up a breeze,i like the ease of putting it together, no fumbling for flanges!

Daniela P.
New Zealand New Zealand
I recommend this product
More sizes needed

Size 21mm is better than 24mm... However, it is still not my perfect size. It would be great to have more size options... Mine are 15mm... So I need to use the parts of other brand to have a good output.

Sinead A.
New Zealand New Zealand
I recommend this product
Double pump

Much more comfortable than the pumps used at the hospitals, managed to get an extra 20mls by using the pump and having it cordless is such a bonus when pumping every 3 hours you can use on the go!