Babies love the SkinSoftTM Teat because it feels so soft and familiar, just like a mother's skin which makes switching between breastfeeding and bottle especially easy.  Proven effect: 94%* of babies accept the MAM Teat. The symmetric shape fits perfectly in babies mouth and because MAM offer a number of different flow rates to perfectly suit whichever stage your baby is at.  Teat size X is perfect for 6 months+ and particularly suitable for thicker liquids. Teats must be replaced every 1-2 months for safety and hygiene reasons.  *Market research 2009- 2017, tested with 1,508 babies.