Chicco Teats Perfect 5, 0M+ Slow Sil 2 Pcs Nipple is of perfect shape and size to fit into the sucking for of baby. Flexible, allows natural and smooth tongue movement. Teats are compatible with all well being bottles and are available in different flows. Anti colic valve prevents the ingestion of air, reducing the risk of colic after feeding. Soft and elastic silicone teat for an easy switch between breastfeeding and bottle feeding.