(Reuters) - Coca-Cola Co reported better-than-expected quarterly revenue on Friday, boosted by strong demand for its zero-sugar sodas and Coca-Cola Plus Coffee, a blend of its traditional soda and coffee.Faltering demand for sugary drinks has forced the world's two largest beverage makers, Coca-Cola and PepsiCo Inc , to roll out low-sugar drinks, while diversifying their offerings into coffee, tea and bottled waters to boost sales.Coca-Cola has been rolling out new offerings such as Coca-Cola..