Step 1 : Introduction to the question "Coca-Cola has a distinct flavor specific to what fast-food chain?"
...Coke actually does taste different — and many would say better — at McDonald’s restaurants. This is largely due to the way it’s packaged. While the actual flavoring is identical to that in other restaurants, McDonald’s gets its Coke syrup delivered in stainless steel tanks instead of the more common plastic bags, which in turn keeps the syrup fresher.