Super-Soft Silicone: The teats are made of high-grade silicone, ensuring they are super-soft and gentle on babies' delicate gums. Precision Cut: Each teat is precision cut to ensure maximum performance and a consistent flow of liquid, providing a comfortable feeding experience for babies. Patented Vent System: Dr. Brown's bottles feature a patented two-piece internal vent system that reduces feeding problems such as colic, burping, and wind. The vent system creates positive-pressure flow, similar to breastfeeding, by fully venting the bottle for vacuum-free feeding. Minimizes Air Intake: As the baby feeds, air is channeled from the teat collar through the vent system, bypassing the breast milk or formula. This helps prevent air from mixing with the liquid, minimizing oxidation and preserving essential nutrients like vitamins C, A, and E. Reduces Discomfort: Babies can feed more comfortably without fighting the negative effects of a vacuum or ingesting air bubbles. This helps reduce common feeding problems and discomfort associated with colic and gas. Prevents Teat Collapse: The vent system ensures that the breast milk or formula flows freely without teat collapse, providing a consistent feeding experience for babies. Overall, Dr. Brown's Narrow Neck Teats Level 3 offer a reliable and comfortable feeding solution for babies, helping to reduce feeding problems and promote a positive feeding experience.