Dr. Browns teats were designed in conjunction with medical professionals and made from medical grade silicone. Dr. Brown's Narrow Mouth Teats have a narrower, more flexible shape to allow your baby to latch on comfortably. The teat is 100% medical silicone and is perforated by laser, which guarantees the highest quality as the hole is exactly the same on all teats of the same level, giving an exact timed flow. Features: - Narrow mouth; - Teat is 100% medical silicone; - Y-Cut Teat – For thicker liquids or cereals. Technical information: - Material: Silicone; - BPA free; - Includes: 2 teats. General information: Levels available according to the baby's approximate age: - Level P: 0m+ (Designed for premature babies); - Level 1: 0m+; - Level 2: 3m+; - Level 3: 6m+; - Level 4: 9m+; - Level Y: 9m+ (Recommended for thick liquids and cereals).