My daughter used only these Nuckel - right from the start. Only the 0-3 months, then 0-6 and then 6-18 Monaten.Besonders the symmetrical shape sucker is really great! As a result, my little one she namely never "wrong" around stuck in his mouth, then what namely can lead to misalignments of the jaw. Even at night must not look only long or feel in the dark, that you properly rum puts it in your mouth you. Therefore, so is this special "flat" sucker form the very well thought out in this product. Furthermore, one of each teat a cap, so that replacement pacifier no "dusting". Although they cost a little more but are worth their money all times. I can recommend it to anyone, because for me they are the best !!!