Playtex Natural Shape Fast Flow Silcone Nipples, 2 ct (2 pack). Silicone nipple Our NaturaLatch Nipple is the perfect choice because it encourages proper latch on for your baby to prevent her from taking in air. If you are switching between bottle and breast feeding, your baby may experience nipple confusion. That’s because many bottle nipples flow too fast. If you use a different latch that’s easier for baby to suckle, she may not want to go back and work “harder” at the breast. The NaturaLatch nipple has been clinically shown to be similar to the breast – in strong latch on and flow rate. BPA Free Made by Playtex A leader in infant feeding.