Maybe try to find one the same shape/ size of the bottle nipple he likes?
My boy only likes the itsy ritzy ones and we tried a whole bunch
My baby likes the pacii.
My LO is still getting used to pacifiers, but he seems to like the tommee tippee ultralight silicone ones.
My baby likes tommee tippie bc its the shape of my finger
I use nipple shields too - the Medela brand and my guy likes Pacii
Itsy ritzy is our biggest success. Not 100% but better than the others
@yentl what one?
Babylist has a sampler pack you can order. One of all the big brand pacis to try
we had the same problem and tried a million, but tommee tippee ultra light has been the only one working for us and he loves it!
My first and now my second both take really well to the MAM ones.
My baby only takes the mam one or nanobebe