This bundle includes two sets of Boon Nursh reusable silicone baby bottles, designed to provide a more natural and comfortable feeding experience for your little one. One set includes three 4-ounce bottles with stage 1 slow flow nipples, perfect for newborns. The other set has three 8-ounce bottles with stage 2 medium flow nipples, suitable for babies transitioning to a faster milk flow. Both sets feature Boon's innovative air-free feeding system with a 100% silicone collapsible pouch that squeezes out air as your baby drinks. This helps reduce gas, spit up, and colic. The pouches can be sterilized, boiled, and frozen. They simply snap into the reusable plastic shell along with the nipple and collar for easy assembly. With fewer parts than traditional bottles and being top-rack dishwasher safe, these Nursh bottles are designed for simple cleaning. Pair them with Boon accessories like storage lids, additional pouches, and bottle drying racks (sold separately) for a complete feeding system. Give your little one the most comfortable feeding experience with Boon's Nursh bottles. This twin set bundles the essentials for every stage of your baby's early development.