artificaily produces Aromas (Esters) are what`s used mostly, this gives the Illusion of "taste".
here`s a few: Ester smells
Ester - Wikipedia, the free encyclopedia
so for instance, you mix a little Methyl benzyl acetate with some sugar and a little citric acid in some fizzy water, add a little red food color and you Think
you`re drinking cherry soda, it`s never Seen a cherry! :(