Looking at this question from health perspective, it is not an ideal thing to drink any of these soft drinks, be it coca cola, energy drink, Pepsi, soda, just to name a few. All these drinks are ladened with unwholesome substances that are deleterious to one's health. And continuous consumptions of them makes one vulnerable to the weakening of the immune system.
This is attributed to the fact that these drinks adds nothing beneficial to the overall functioning of the human body. If you are observant enough, you would notice that the drinkers of these drinks often fall ill. Why? Because their immune system is not strong enough to combat sickness and diseases invading their body.
More importantly, these drinks are packed with chemicals that can shorten one's life. And the sugar content in them can spike one's blood sugar level leading to diabetes. Obesity and heart diseases are not left out of the equation of the risks involve in the intake of these drinks.