MAM Easy Active Baby Bottle Twin Pack- Blue has a Fast Flow, which is suitable for babies from 4+ months. The Active Baby Bottle have a wide opening for easy filling and cleaning and easy to hold bottle shape for active babies. Learning to drink made easy. MAM have products for babies of all ages and stages, the MAM Easy Active Baby Bottle Twin Pack- Blue 330ml comes with a Fast flow teat to support individual baby development. They are perfectly designed for your baby's small hands thanks to their ergonomic shape, and with wide openings they make for easy filling and cleaning. Like all MAM bottles they include the Skin Soft teat which is silky soft and provides a familiar feel for babies. Market research confirms that 94% of babies accept the teat making it perfect for when mum wants to be a bit more flexible. (Market research 2009-2017, tested with 1, 508 babies)