Medela wide base silicone nipples natural feel and shape complements breastfeeding. Available in slow and medium flow for feeding newborns and infants. May be cleaned in the dishwasher, micro steamed, boiled or washed by hand. Made without BPA safe for mom and baby. All Medela breastmilk bottles and products that come in contact with breastmilk are and always have been made without BPA.