Help! I've let my son still drink from his nuby ba-bas and he's almost 4! He gave up traditional baby bottle at 1 1/2yrs when the ba-ba fairy came to our house to take them away. We started with the nuby version as all of his friends were using it as a transition and I thought "good idea". He just adores his ba-bas and they are his only security "attachement-thing". Is it so wrong to let him keep drinking his milk this way? He does drink from cups/straws at mealtime and drinks water via cup too. Any advise would be VERY appreciated!