Many works of fiction have incorporated into their world the existence of beverages or drinks – liquids made for popular consumption – which may create a sense of the world in which the story takes place, and in some cases may serve to advance the plot of the story.
These products may be fictional brands which serve as a stand in for brand names, and in that capacity may be a vessel for mockery of the marketing culture associated with brand name products (e.g., Duff Beer from The Simpsons; Buzz Beer from The Drew Carey Show).
In science fiction, beverages from alien races may enhance the sense of a futuristic society (e.g. Romulan Ale in Star Trek).
Better Call Saul Some real-life beverages were created and marketed after appearing as fictional, as is the case with Duff Beer from the TV show The Simpsons.
To promote The Simpsons Movie, convenience store 7-Eleven marketed a Duff-branded energy drink.