When children get ready to head back-to-school, parents must begin thinking about packing healthy lunches. Besides food, it is important to consider nutritious drinks that support good oral health. Here are a few dental tips that explain some good and bad beverage choices. The Bad: Soda. Some of the worst drinks to pack in a child’s lunch are carbonated beverages and sodas. Normally, these contain high amounts of sugar that destroy teeth. Many of these drinks contain acids that eat away at tooth enamel as well. Even canned teas often contain acids that enhance flavors and erode enamel. Energy Drinks.