The filtered water and the Coca-Cola syrup used, McDonald's adds, are pre-chilled before they enter fountain dispensers, with extra syrup added so that when ice is added to a drink, it allows for ...

The 800-gallon tank fills up each day, sometimes more than once during peak season. The sap then goes to “the sugar shack,” where a state-of-the-art machine evaporates the sap into syrup.