Evoking nostalgia amongst '90s kids, Coca-Cola is bringing back its citrus-flavoured drink Surge after it was discontinued 12 years ago. The limited supply of Surge is thanks to a Facebook campaign that lobbied Coke to bring back an old favourite.

If obesity is an international crisis, sugar is increasingly cast as the chief villain. In response, Coca-Cola, the world's most valuable brand, has openly pressed moral 'reset', throwing itself into the drive for collective health improvement.

“The fans have spoken," said Coca-Cola. "We’re changing back to the taste you know and love.” When the brand tried to make its Vitaminwater healthier by switching from sugar to Stevia, unhappy fans took to social media. Does this mean taste still wins over health?

Growing health concerns mean that US soda sales are declining. People are avoiding classic versions made with corn syrup - but they're also steering clear of 'healthy' diet sodas, due to their artificial sweeteners. Can a “Pepsi made with real sugar” make an impact?