If the baby is completely dependent on artificial feeding preferably use bottles that prevent colic by a large percentage to reduce the proportion of air entering the baby stomach significantly and help the baby to rest?from severe colic therefore the 360? Straw Bottle is perfect because the 360 straw is designed to transfer liquids from the bottle to the nipple preventing air completely which prevent any colic or reflux events and allows drinking from any angle without air entering to help prevent colic and hiccups.