Olababy GentleBottle Silicone Replacement Nipple is the teat forOlababy GentleBottle. Naturally shaped,offset, silicone nipples designed for easy latching and feeding Offset design promotes upright feeding and ensures smooth milk flow down to the last drop Dual anti colic vents prevent burping reduces colic Wide neck is easy to clean Safe in microwave, boiling water, dishwashers and sterilizers 100% Medical grade silicone, BPA free, phthalate free and toxin free Purchase the Olababy GentleBottle 4oz, Olababy GentleBottle 8oz. Product contains 2 xOlababy GentleBottle Silicone Replacement Nipple Recommended for babies 0+ months. Select the right size for your baby: Slow Flow (0-3 months) Medium Flow (3+ months) Fast Flow (6+ months) X-Cut (6+ months) / For Thicker Liquids Olababy GentleBottle is a milk feeding bottle that features an off-centered nipple to imitate a real breast. This design makes it easy for baby to transit back and forth easily between breastfeeding and bottle feeding. Its dual vent also reduces colic, allowing baby to consume milk without ingesting too much gas. This bottle is aimed at making milk feeding time seamless and easy. Attractive colors stimulate babys visual senses Off-centered nipple design mimics natural breasts Integrated dual-venting anti-colic system Smooth texture makes it easy to hold Wide neck allows for easy cleaning 100% Medical-grade silicone BPA, PVC, Phthalate free