The Playtex Drop-Ins NaturaLatchTM nipple is a perfect choice for babies switching between bottle and breast. To reduce nipple confusion, the NaturaLatchTM nipple features a raised, textured area that is more like the breast. The NaturaLatchTM Silicone, Medium Flow nipple has been clinically proven to support breastfeeding. 2 Medium Flow Silicone Nipples