Bottles feature improved Perfect Fit nipple, which is the same shape as Mom's nursing nipple for the Perfect Fit in baby's mouth, just like Mom, so you know that your baby will love these disney bottles. The Perfect Fit silicone nipples is ideal for babies 0 to 6 months and offered in a slow and medium flow. BPA Free. Dishwasher Safe. Leak-proof nipple sealing hood. For best results when feeding. The Perfect Fit silicone nipple features Soft Zone that provides greater comfort for your baby as soft satiny finish conforms to baby’s palate.