Dr. Brown's Natural Flow Standard Baby Bottle, widely recognized for reducing feeding problems such as colic, spit-up and burping, is a tried and tested favorite with parents focused on helping their little ones experience happy feeding. Featuring a traditional narrow shape plus the original vent system that set the standard for the industry, this bottle eliminates air intake in milk or formula and is proven to help preserve bottle milk nutrients, including Vitamins C, A, and E plus Lipids that are critical for health in infancy. Vacuum-free feeding promotes good digestion, essential for babies and particularly newborns, and makes the bottle design closest to breastfeeding as milk or formula flows freely without nipple collapse. In addition, the Internal Vent System and silicone nipple work seamlessly together, resulting in controlled flow so babies feed at their own pace