This bottle gift set is designed to reduce colic gas and reflux. AirFree vent is designed to draw air away from nipple. Secure latch nipple design with ribbed texture prevents nipple collapse. Nipples are available in different flow rates. Nipple stays full when bottle is horizontal and helps reduce reflux and aids digestion. Side neck and fewer parts makes it easy to clean and assemble. Dishwasher and microwave safe. For ages 0 to 12 months. Includes: 4 Baby bottles. Milk powder dispenser. Trainer cup. 0-6 Month pacifier. Bottle and nipple brush.