At Olababy, we believe transitional feeding from breast to bottle is one of the most critical milestones in a babies’ growth. The nipple is one of the most key parts of the bottle. A comfortable nipple will not only make the breast to bottle transition easier, but also establish good feeding habits. All our nipples mimic mother’s natural breast to reduce bottle rejection. Its dual anti-colic vent system reduces colic, reflux and gas. The offset design encourages continuous milk flow and upright feeding habit. All Our nipples are made with 100% non toxic silicone that are BPA, PVC, PVA and Phthalate Free. Selecting the flow rate is important when switching from breast to bottle. Too slow of a flow rate can lead to frustration and under feeding. Too fast of a rate can cause choking, nasal regurgitation and spit ups. These are the top leading causes of bottle rejection. The Olababy nipple flows are customized to provide the optimal feeding flow rate to the little ones. The Preemie nipple is designed for babies who require a slower nipple than a traditional slow flow nipple, perfect for the bottle introduction stage.