Now your baby can transition from breast to bottle in a natural way with NUK Simply Natural glass bottles. Designed to mimic the fit, flow, and movement of mom as closely as possible, This is the only bottle with up to nine nipple holes, just like mom. This provides a natural feeding experience to ensure the mom-baby bond remains strong. Our bottles feature an even softer nipple than before. NUK Simply Natural nipples mimic the shape mom’s breast takes while breastfeeding. The scooped nipple cavity allows space for baby’s tongue and jaw to move naturally, just like they do when breastfeeding.