Dr. Browns PP Narrow Options+ Sampler Kit includes the necessary bottles and nipples that you will need to feed your newborn. The bottles are anti-colic and reduce all the feeding problems that your little may encounter such as spit up, gas, and burping. They have a vent system that prevents the bubble oxidation which preserve all the milk nutrients and vitamins. Plastic bottles and BPA free. Recommended for newborns. 2 0Months+ Nipples & 2 3Months+ Nipples