We have tried many different kinds of nipples over the years but all three of our kids have done the best with these.

Great to use with pumping bottles but the price is ridiculous for the nipples and cuffs. Its all part of the monopoly of needing these parts.

This does not fit the medela bottles that came with the medela advanced pump!

Medela products awesome.
Medela 3 Piece Wide Base Slow Flow Nipple, 0-4 Months