This Breast Milk Bottle Set comes with 3- 5 ounce bottles with nipples, collars, solid lids and caps. All products included are dishwasher and microwave safe. This set is also compatible with all Medela breast pumps for pumping directly into the bottle. Medela breast milk bottles are made without BPA. Safe plastic designed to retain breast milk's benefits.Medela is committed to supporting the WHO Code’s call for commitment to breastfeeding and breast milk as the optimal nutrition for the growth, development and health of babies. In line with the AAP Guidelines on introducing bottle feeding, Medela recommends that breastfeeding be well established before introducing a nipple.