Pepsi is asking people out and about in Atlanta to sip from unmarked cups of Pepsi Zero Sugar and Coca-Cola Zero Sugar to decide which they prefer.

Coca-Cola ad ‘I’d Like To Buy The World A Coke’ evolved into a full song, recorded as “I’d Like to Teach the World to Sing.” ...

In a move that's sure to stir the pot of inter-cola rivalry, Pepsi claims that in every market visited since February, ...