Weaning of the bottle, why?
Babies should be weaned off the bottle somewhere between a year old and a year and a half, give or take. Prolonged use of a bottle or pacifier even can cause dental issues like tooth decay and misalignment of the teeth growing in. It can also cause jaw issues, though this is rare. Another thing is that older children may drink bottles laying down which can be a choking hazard. Another choking hazard can happen if their teeth are able to bite of of pieces of the nipple. Those hazards are rare, but worthy of consideration.