Dr. Brown's Natural Flow Level 2 Narrow Nipple (3m+) - Set of 2 For babies from 3 months. The teats of Dr. Brown's are made of clinically tested silicone. The very soft texture and special shape fit perfectly in your baby's mouth. Replace teats exhibit every six weeks, or earlier if they show signs of wear and tear. Per packed two pieces. What teat I choose? Dr. Brown's teats have various kinds. The difference is in the speed at which the power flows. Phase 2 flows faster than phase 1, phase 3, phase faster than 2, etc. In the table you see exactly which teat is suitable for your baby. premature Peen Especially for premature babies Phase 1 for newborns Phase 2 From 3 months phase 3 From 6 months Stage 4 / Dad Peen From about 9 months. For smooth papsoorten. Also suitable for voracious eaters