Universally threaded to fit any standard baby bottle. The newborn size has one hole for the slowest flow Avent offers. Choose from nipples for disposable or reusable bottles. Reusable bottles found on the accessories page with other storage systems. This size has two holes .
Standard system takes a clear nipple.
We do not carry the three and four hole nipples because most breastfed babies do not need these faster flow nipples. Sorry, slow flow nipples for NON-disposable temporarily out of stock. Also fits older styles of Medela breast pumps whose valve membrane attaches in the center of the disk. For a complete selection of breast pump replacement parts click here . Package contains one teat.