anti colic baby bottles.number one pediatrician recommended.clinically proven to reduce colic,spit up,burping,and gas.set includes 3- 8 oz bottles, 2 4 oz bottles,5 level 1 nipples, 2 level 2 nipples, 2 level 3 nipples,2 level 4 nipples,2 storage/ travel caps, a bottle brush,a happy paci silicone pacifier 0-6 months,and a formula dispenser.