"Infant paced feeding valve (valve that stimulates baby to suck). Internal ventilation valve allows vacuumfree feeding. Even and reliable suction cup flow Dr. Brown Medical Baby Bottles have been developed in collaboration with doctors who explore the feeding of babies identified with complex feeding problems It is often observed in babies with split ends and palate, ankyloglossi, high charched palate, oneneuromotor dysfunction, frequent or rare syndrome sequences or craniofacial abomalies"