The decay resulting from the repeated use of the bottle is due to the long exposure of the child's teeth to liquids containing sugar, milk, liquid meals, fruit juice and other sweetened liquids that bring the problem. The sugar in these liquids is used as a source of energy for the bacteria found in the plaque. The layer of plaque is a thin invisible semi-invisible layer of bacteria and its products are constantly formed on the teeth of any person. The process of formation of caries begins with the production of bacteria to acids that attack the enamel of the tooth, and the more frequent and prolonged contact with the teeth, the more harm if given Your baby is a bottle of fluid that contains fluids several times a day as a breast feeding. It is not desirable. Also, allowing your child to keep the bottle in his mouth during siesta or during sleep at night may cause great harm and damage to his teeth. During sleep, the flow of saliva decreases. Artificial lactation gathers around the teeth for a very long time.