Drinking cola type sodas is very unhealthy. Just drinking 16 ounces or more of cola sodas each day can double the risk of developing chronic kidney disease. They can also contribute to hypertension, diabetes, and kidney stones. The phosphoric acid that they contain are commonly linked to kidney stones. They can also cause lower bone density, which increases the risk of osteoporosis and bone fractures. Noncola sodas don't have the same impact on the kidneys but they are still unhealthy. It is a healthy idea to skip sodas altogether.