The wide breast formed nipple advances a natural lock on like the breasts. Intended to give a more agreeable and placated feed for your child ; The petals inside the nipple and the edge configuration, increase the nipple non-abrasiveness and adaptability, ensuring no nipple crumple for developing children ; Comforts baby by providing proper air ventilation from baby’s lungs ; The Philips Avent Natural bottle is accessible in 4 sizes and 7 distinct nipple for each improvement phase of your child. With various nipple delicate quality, adaptability and design and with increasing flow rates and container sizes that keep with your child's development and advancement.