Dr. Brown's Medical Specialty Feeding System Bottle (SFS) was designed in collaboration with medical professionals seeking an oral feeding solution for infants identified with complex feeding challenges such as cleft lip and palate, ankyloglossia, high-arched palate, oro-neuromotor dysfunction, common or rare syndromic sequences and/or craniofacial anomalies. The Specialty Feeding System exhibits the essential qualities of a Dr. Brown's Natural Flow bottle which includes the internal vent system, clinically proven to reduce colic – spit-up, burping, and gas. This bottle system also helps preserve vitamins C, A, and E in breast milk. The included Infant-Paced Feeding Valve is inserted into a Narrow Dr. Brown's silicone nipple to create a “compression” nipple. When used in combination with a Dr. Brown's bottle system, the blue one-way valve assists the infant in self-regulation during oral feedings. The infant feeding system offers a consistent and reliable nipple flow rate for infant-directed feedings, and the non-squeeze method helps decrease gassiness, air intake, and burping. Dishwasher (top rack only) and sterilizer safe for convenient cleaning. Dr. Brown's Medical Specialty Feeding System Includes: 2x 8 oz/250 mL Baby Bottle, 2x Level 1 Silicone Nipple, 2x Infant-Paced Feeding Valves, and Cleaning Brush. Important: Consult your health care provider before using the Dr. Brown's Specialty Feeding System to confirm this bottle system is recommended for your baby's feeding challenge.