Bacteria causing decay are transmitted, soon after an infant’s first teeth erupt in the mouth. Early childhood caries (ECC), also known as “baby bottle caries”, is a major health concern that continues to negatively affect the oral health of children aged 2-5. Frequent bottle feeding at night is associated with ECC, as – during sleep – the amount of saliva in the mouth is significantly reduced while the milk stays on the teeth, causing decay. Therefore, use baby bottles only for milk or water and only during the day, never when the baby is asleep.