feeding, creating a positive-pressure flow similar to breastfeeding. Minimizes Air Intake: As your baby feeds, air is channeled from the teat collar through the vent system, bypassing the breast milk or formula, and reaching the back of the bottle. This prevents air from mixing with the milk or formula, minimizing oxidation and helping to maintain essential nutrients. Reduces Feeding Problems: By eliminating the negative effects of vacuum and air bubbles, the vent system allows babies to feed more comfortably, reducing common feeding problems like colic, burping, and wind. Prevents Teat Collapse: With Dr. Brown's bottle system, the breast milk or formula flows freely without teat collapse, ensuring a consistent feeding experience for your baby. Dr. Brown's Wide Neck Teats Level 4 are suitable for babies who require a faster flow of liquid during feeding. They are designed to provide a comfortable and efficient feeding experience while reducing feeding problems and ensuring the preservation of essential nutrients in the milk or formula. Ensure to follow the manufacturer's instructions for proper use and cleaning of the teats and bottles.