Replacement nipples are available in two different flow rates: slow and medium With natural colors, textures and forms, the mimijumi baby bottle provides the perfect complement to breastfeeding and the best possible transition to bottle feeding. The innovative nipple design replicates a mother's breast, creating a natural feeding and latching experience for a happier and healthier bottle fed baby. Bold colors and soft textures are combined to give the mimijumi baby bottle a distinctive, eye-catching appearance. Integrated venting prevents colic while the one-piece construction means less parts to clean. Only the safest medical and food grade silicone is used to ensure a worry-free and healthy bottle feeding experience for your baby.