These medium flow silicone teats are specially designed for our narrow neck Classic Start baby bottles. With an anti-colic valve, and now even softer*, for your baby's feeding comfort from three months and up. • Medium flow teats for babies aged 3m+, please note that this age is only a guide, every feeding journey is different • Anti-colic valve • Dishwasher and steriliser safe • BPA free *When compared to our previous standard neck bottle teat. **To verify please visit the Amazon product page.