The syrup is manufactured by Dr Pepper themselves (they couldn't keep the recipe secret otherwise, as Coke famously did). Sometimes the carbonated water is adde

The syrup is manufactured by Dr Pepper themselves (they couldn't keep the recipe secret otherwise, as Coke famously did). Sometimes the carbonated water is added and bottled by various distributors to be more specific. But there are also clearly economies of scale with bottling plant size, location, shipping costs, retail channel partnerships, jurisdictional regulations, etc that factor into where this bottling takes place.