Glad that it can fit avent bottles

Best Buy for esp when you have different bottle types.

Have difficulty to screw tight with some medela bottles. Overall, it did its job but not sure if it will lose suction when it is not tight

It works well as described

Working well with my other brand of bottles

Bought these as I use medela bottles. Fits well and no leakages. Good buy.

very convenient product to have on hand, especially when you are a regular user of the breast pump! must buy!

Totally matched into my meddle bottles. No leakage at all!

Helps me to pump directly into our Medela and Pigeon bottles and minimise wastage from milk transfer.

These are necessary if you are, like me, switching from Medela to Spectra and have tons of Medela bottles. I actually also bought these for my Lifefactory bottles, which are narrow neck, to use with my new Spectra pump which has wide neck flanges.

However, I do think they are pricey for what they are - two plastic rings that allow the wide neck flanges to be used with the narrow neck bottles. I did not actually wind up using them all that much because Spectra came with two bottles (albeit plastic) and using two glass bottles makes the whole thing too heavy to comfortably sit in my pumping bra.

I wish I had considered this before buying, but if you are buying this to convert medela bottles, this should do the trick!