Designed specifically for breastfeeding babies, the Lansinoh mOmma Bottle with NaturalWave Nipple is the perfect bottle for when you are apart from your baby. Based on more than 50 years of research, the NaturalWave Nipple enables baby to engage in the same natural sucking actions learned at the breast allowing for a smooth transition from breast to bottle and back again. PTPA Award Winner * Encourages natural oral development; * Enables baby to use feeding actions learned at the breast; * Air Ventilation System (AVS) reduces intake of gas, a potential cause of colic or spit up; * Fewer parts - easy to assemble & clean ; * Clinically proven to reduce nipple preference in established breastfed babies; * NaturalWave Nipple is 100 % silicone, soft, flexible and designed for optimal compression ; * BPA Free; Product Contents: * 8oz Lansinoh mOmma Bottle; * 2 NaturalWave Nipples, collar and cap;Lansinoh Laboratorie