These foreign companies sell their product in countries like India to gain more and more. They will not take care of health, they add such type of minerals which makes addictive. Cold drinks like Cock, Pespsi contains such type of minerals which make you addictive of these.

Not only Cocoa Cola. Any aerated drinks are fatal to health. Another reason is for Cocoa Cola  craze is many are not aware of the health hazards related to aerated drinks. Youth especially think that holding a Coke bottle in hand is a fashion statement.

The fiction is spread by stars who are advertising for these companies. Kids and youngsters think that their super hero are saying the truth and after drinking these drinks they will also become like their super hero. And most of them use slogans like "Darr ke aage Jeet hai", "asli pyas bujhaye pepsi" and many more. 

That belief is due to "Herd Mentality " and lack of awareness.