Feed your baby with clinically proven Avent Anti-Colic Feeding Bottle, SCF821/14. It is made to provide discomfort-free feeding. It is made with a unique anti-colic feature, which makes sure that no air enters your baby's stomach to cause any digestion issue. It only allows milk to enter from the nipple with the required flow rate to prevent any spit-up or over-feeding. It's easier to grip shape allows your baby to hold it easily. Your baby can have peaceful sleep without any disturbance after taking his feed from this bottle.