Why is it bad to let the baby fall asleep with the bottle?

Tooth decay: Babies who fall asleep with a bottle in their mouths are sleeping with milk sugar on their teeth. This leads to baby bottle tooth decay. It is much better to use a pacifier, if needed, at bedtime.

Tooth decay: The most important reason not to allow your baby to fall asleep with a bottle in his/her mouth, or to keep a bottle with him all night, is because of the risk of severe tooth decay, called bottle caries. There is also some evidence that babies who drink while lying flat have a higher rate of ear infections.