My bb also use Avent and she need it everytime when she go to sleep but will throw away once she was in deep sleep...
I want to change the one from 3th to 6th month, however, since my bb get use to the old one and it's hard for me to change it... so even now she is almost 4 months old but I am still using the one from 0 to 3 months, do you think any problem?