We dropped it somewhere between 6 and 7 months. And we decided to drop it, not only cos he was on more solids, but he would absolutely scream when we woke him up cos he was getting in such a deep sleep. So we just let him be one night, and he woke up around 3.30, so we gave him his dummy, and he slept until about 6.30. So we stopped doing it from that point. It was awful waking him up and him screaming, made us feel so bad!!!!