What is the best bottle for a premature baby who suffered necrotizing entercolitis?

Same as hospital : The type of bottle is not as important as the nipple. Use the one your baby is familiar with in the hospital. We don't use special bottles, liners, etc. If you hold your baby during a feeding, no air will enter the nipple. Use a premie nipple if your baby is using one in the hospital. I hope your baby is doing well and soon on the way home.