He poured carbonated red grape juice into a long-stemmed glass and set the bottle back in the refrigerator.
It's basically carbonated white grape juice.
According to Louis Pasteur, about oth of the sugar transformed under ordinary conditions in the fermentation of grape juice and similar saccharine liquids into alcohol and other products becomes converted into glycerin.
It is probable that the discovery that an intoxicating and pleasant beverage could be made from grape juice was purely accidental, and that it arose from observations made in connexion with crushed or bruised wild grapes, much as the manufacture of beer, or in its earliest form, mead, may be traced back to the accidental fermentation of wild honey.
The main products formed are, as in all cases of Constitution of Grape Juice at Various Periods of Maturation.
