@suddymaya @verobaby we've tried the narrow based ones and he screamed and threw his head around the whole time. We've tried Dr. Browns, Nuk, and he hates them. My daughter used Avent, but we tried those too and he kind of takes it but still fiddles.

look for a long neck nipple the doctor told me it's easier for babies to latch to. i bought the 3 pack of the gerber ones from Walmart for 3 dollars it's the easiest for my son to take.

from the picture it looks like the nipples have a wide base. narrow bases are better for breastfed babies. we use Dr. Brown bottles with a preemie flow nipple to mimic a slower flow closer to breastfeeding. some babies have a bottle preference.