Our Comotomo Baby Bottle Bundle includes two 5oz.(150 ml) bottles, two 8oz. (250 ml) bottles, and a pack each of our Slow flow, Medium flow, and Fast flow replacement nipples. (Replacement nipple packs come with two nipples each.) As a 4 pack, this bundle of Comotomo baby bottles makes feeding and cleaning convenient for most new moms. The 8 oz. size is great for babies who have moved to eating more at one time, making feeding time an easy and enjoyable task. Of course, our patented design helps keep colic symptoms in check while reducing the possibility of baby refusing the bottle while transitioning from mommy's breast.