Disney by Born Free Bottle System is uniquely designed to address the feeding needs of all babies- whether they are breastfed, formula fed, or both- making it the natural feeding choice for all mothers. The patented ActiveFlow Venting Technology helps extend breastfeeding by mimicking mothers natural flow which is controlled by baby while nursing. This active feeding helps prevent nipple confusion and reduces air ingested by baby while feeding. The ActiveFlow Technology is also clinically designed to reduce colic symptoms such as gas pain and fussiness which can be experienced particularly after drinking formula Natural Milk Flow, controlled by baby; Naturally Fuss free, ActiveFlow venting technology clinically designed to reduce colic symptoms; BPA and PVC Free Soft Silicone Nipples Available in 5 flow rates; 5oz bottle include slow flow and 9oz include medium flow; High Quality Polypro PlasticTop rack dishwasher safe Hassle free fewer parts to maintain and clean; Includes sealing disc for travel and bottle cap Styles and colors may vary