India's food safety regulator, FSSAI, has asked companies including Red Bull, PepsiCo, Monster, Hell Energy and Reliance Consumer Products to stop using the term "energy drink" on high-caffeine beverages. The move isn't a ban on these products, which will continue to be sold as caffeinated beverages, but it marks a major shift in how they can be marketed. Why is the regulator making this change? What does it mean for brands, consumers and India's fast-growing $1.6 billion market? Here's everything you need to know. Show more Show less