MAM Teats (Fast Flow) 4+months Features: - BPA free - Scientifically Proven - Makes switching between breastfeeding and bottle especially easy. Thanks to its silky soft silicone surface that feels so familiar. - Silk Teat (silky soft silicone surfac) for a familiar drinking feeling - Air Valve to prevent the teat from collapsing and to allow for an even drinking flow - Symmetric Shape to perfectly fit in your baby\'s mouth MAM teats fit all MAM bottles and the Trainer. They are suitable for all kinds of baby drinks. The MAM teat is available in five different flow rates: 1 - Slow flow 0+ Months 2 - Medium flow 2+ Months 3 - Fast flow 4+ Months Spill-free, fast flow 4+ Months X - extra fast flow for thicker liquids 6+ Months