Part of the Anti-Colic collection Suitable for ages six to 18 months Includes three 9oz. (260ml) baby bottles Integrated anti-colic valve sends air away from your baby's tummy, reducing discomfort Ribbed texture of the nipple prevents collapsing, ensuring a continuous milk flow Spill-proof design ensures a mess-free use Made from polypropylene for enhanced durability BPA, PVC, and phthalate-free means your baby's food is safe from all harmful chemicals Dishwasher safe for easy cleaning Microwave-safe design allows you to easily warm these bottles