The adorable bottles in this set are designed to reduce air intake. The bottles for girls feature flowers, butterflies, and polka dots. The bottles for boys feature vehicles, alligators, and a colorful zigzag design. These bottles have soft, vented silicone slow-flow nipples and secure caps to keep the nipples clean. Three 5 oz. bottles and three 9 oz. bottles are included in this set, as well as a bottle and nipple brush for cleaning the bottles. The bottles are BPA free and are dishwasher safe.