The Chicco Duo Intui-Latch Nipple, with a 9 out of 10 acceptance rate by infants, has a breast-like flow, natural skin-like feel and an anti-colic valve. The 100% silicone nipple is shaped for a secure latch while the anti-colic valve and breast-like flow ensures there’s less air ingestion, so baby can feed comfortably. Available in Stage 1 Slow Flow (0m+), Stage 2 Medium Flow (3m+) and Stage 3 Fast Flow (6m+). BPA, BPS, PVC, Phthalate free. Made in Italy. Fits all Chicco Duo bottles. 2 Pieces per pack. INTUI-LATCH NIPPLE - Accepted by 9 out of 10 babies (2018 consumer test in Italy on 446 babies, 0-6m) SHAPED TO FIT - Nipple shape positions baby's tongue and lips for a natural, intuitive latch ANTI-COLIC VALVE - For less air ingestion and baby's feeding comfort BREAST-LIKE - Flow is easy for baby to control - ideal for breast to bottle feeding. Soft silicone with skin-like texture helps baby stay latched (2) Stage 2 Medium Flow Nipples for babies 3m+ included. Free of BPA, BPS, PVC, and Phthalates. Made in Italy