Thinkbaby knows breastfeeding is best for baby. That’s why the anti-colic nipple is designed to closely mimic breastfeeding. The cross-cut nipple design requires baby to nurse in order to draw the milk out of the bottle. In addition, the shape helps reduce gases in the stomach, making baby less gassy and colic-y. The unique one-piece design makes it easier to clean and refill. Thinkbaby uses only medical grade silicone that’s soft and easy for baby to drink. Made for infants 0-6 months.