Set of spare parts for Nuvita feeding bottles - Y Teat 6064, NU-ALMB0013 Set of spare parts for Nuvita feeding bottles composed of 2 nipples , in medical "skin-like" silicone, and 1 anti-colic valve. The innovative teat is designed to not only look like but more importantly behave like your breast during feeding. The special flat, elongated shape and concave base allow the nipple to move up and down, stretch and contract just like your nipple during feeding. In addition, the wide surface and skin-like finish give your baby the comfortable sensation of being in contact with your breast. This makes it easier to alternate breast and bottle feeding without interrupting the habit of natural breastfeeding. Product Features: Flat and longer nipple to facilitate the natural tongue peristaltic movement. The hollow base simulates the natural elasticity of the material nipple during breastfeeding.