These 2 nipples for Special Breastfeeding Bottle resemble the breast (texture and consistency of very soft silicone) and recreate the conditions of breastfeeding. The breastfeeding flow teats have openings that allow more or less liquid to pass through depending on the baby's sucking force. They are specially designed for alternating breast and bottle feeding. They prevent the ingestion of air and are always filled with milk. They also allow a correct position for baby's neck and help prevent reflux and ear infections.