If all else fails, dilute your coke. You may make it with either water or regular seltzer. Begin with a tiny quantity and gradually increase until you're just drinking half a glass or less of soda. Coca-Cola was originally made with seven percent alcohol by volume. This helps to stabilize the beverage during transport and storage and gives it its distinctive taste. Today, however, most Coca-Colas are made with sugar instead! The best way to drink coke is simply without mixing it with anything else. However, if you must mix it, do so in moderation. A small amount of carbonated water on top of your coke won't hurt one bit! Coke is a popular beverage among adults and children alike. It is sweetened with sugar rather than fruit juice because scientists think this makes it more nutritious. Also, since caffeine is an additive used to keep people awake, the government requires it be listed on food labels. Coke contains about 30 milligrams of caffeine per 12 oz bottle or can. According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), the main ingredient in coke, caffeine, can cause problems for some people with diabetes. Caffeine can raise blood glucose levels in people with diabetes, especially those that use insulin.