2018-04-01
They do list ingredients, as required by (U.S.) law.
CARBONATED WATER, HIGH FRUCTOSE CORN SYRUP, CARAMEL COLOR, PHOSPHORIC ACID, NATURAL FLAVORS, CAFFEINE.
But the law does not require them to spell out exactly what all those "natural flavors" are, nor the exact proportions, nor the processes they put the ingredients through - for Coca-Cola, or anything else.
The more interesting case is wine, which does not have to list ingredients in the U.S., as the law contains an exemption for wine.