Even in places where concentrate is delivered, they add the sweetener (HFCS, sugar, fruit juice, etc depending on location and product) at the bottling plant.

Even in places where concentrate is delivered, they add the sweetener (HFCS, sugar, fruit juice, etc depending on location and product) at the bottling plant. Coke is about 10% by volume sugar, and the pre-mixed syrup with sweetener (like used in soda fountains) is usually prepared for a 5:1 dilution ratio in a soda fountain. The concentrate that goes to the bottling plants is basically straight phosphoric acid and caffeine with some secret 'natural flavors' that is usually diluted at more than 1:100 ratio with the sweetener.