Medela Wide Base Nipple in Slow flow, to better accommodate feeding newborns and infants. 

FEATURES:

• Compatible with all Medela breast milk bottles: Natural feel and shape.
• Easy cleaning: Nipples may be cleaned in the dishwasher, Micro-Steamed, boiled or washed by hand.
• Can only be used with wide base collars: Medela breast milk bottles come with wide base collars. Replacement collars are sold separately.
• Made without BPA: All parts that come into contact with breast milk are not made with BPA.