The 3 + Months Medium flow is our most popular teat. It's the perfect step up from the slow flow and it also works well for older babies who do better with faster flows but not yet ready for the fast or advance rate. The 3 + teat works in unison with babies who have established a good breastfeeding technique who require a teat that will not affect this. Because babies use the instinctive latch and motion they more readily take Minbie when they refuse other teats.