PepsiCo is to buy carbonated drink-machine maker SodaStream for $3.2 billion as it battles Coca-Cola for an edge in the health-conscious beverage market. Photograph: Jim Hollander/EPA

PepsiCo will buy carbonated drink-machine maker SodaStream for $3.2 billion as it battles Coca-Cola for an edge in the health-conscious beverage marke(...)