Created by a physican, Dr. Brown's Natural Flow baby bottles feature a patented internal vent system that helps reduce colic, spit-up, burping and gas. The positive presure design allows babies to feed comfortably, because the vent system eliminates the air bubbles and vacuum. All parts are dishwasher safe. Newborn Feeding Set includes 3-8oz bottles, 2-4oz bottles, 5-Level One silicone nipples, 2-Level 2 silicone nipples,5-Two piece patented internal...   Show More

Created by a physican, Dr. Brown's Natural Flow baby bottles feature a patented internal vent system that helps reduce colic, spit-up, burping and gas. The positive presure design allows babies to feed comfortably, because the vent system eliminates the air bubbles and vacuum. All parts are dishwasher safe. Newborn Feeding Set includes 3-8oz bottles, 2-4oz bottles, 5-Level One silicone nipples, 2-Level 2 silicone nipples,5-Two piece patented internal vents, 2 storage/travel caps,3 stainless steel cleaning brushes, instructions.   Show Less