Soft drinks are terrible. Years ago, I was guzzling bottles of them daily at work and buying the jumbo bottles to take home. One day I was with a friend and wanted to buy a couple of soft drinks for us. He politely refused, saying that he worked in one of the soft drink factories and none of the employees in the factory ever drank a drop of the stuff they were chruning out ! He explained what went into it and that was enough for me. I switched over to drinking water and fresh fruit juices  and said good bye to a variety of stomach related complaints ever since !