Besides being bad for your teeth it's a nightmare on your body. That insulin dump from the onslaught of sugar will make you much more likely to develop diabetes, and some studies have shown a long-term metabolic effect where your body prefers sugars for energy instead of fats. That and the empty calories will lop-side your diet and make it harder to lose weight or gain muscle.

There are lots of ways you can drink something tasty and not have such a huge impact on your body. Sometimes i'll buy a two-liter of green tea ginger ale or cranberry juice, and make a 50/50 or 25/75 mix of the drink and tap water.

You can also just cold-brew tea or coffee and mix in a little sweetener or other flavor to change it up. It's cheaper than soda and (after you stop drinking soda every day) tastes much better because you're not getting hit over the head with truckloads of sugars. Ask a European about how sweet all our foods and drinks are.