Jesus you guys, is it so hard to shoplift a fucking bottle of fleishmann's vodka?
For around $10 or so, you could potentially buy enough grape juice and yeast to make about 5 gallons of wine in about a month to month and a half's time. It's not that hard.. It'll probably taste like shit (you can always add sugar though), but I'm bound to know that it has to taste a hell of a lot better than mouthwash.
Sugar is actually an ingredient. It gives it alcohol content.