Which fictional brand from literature was so convincingly written that real consumers sent mail order requests to purchase it, despite the product being entirely fictional?

Throughout history, some authors have mastered the art of brand storytelling long before it became a marketing buzzword. Their fictional brands and products have become so iconic that they've transcended literature to become cultural touchstones. This poll tests your knowledge of these literary brand creations and their impact on both literature and real-world marketing strategies.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Wonka Bars from 'Charlie and the Chocolate Factory' by Roald Dahl
Duff Beer from 'The Simpsons' universe
The Great Gatsby's fictional 'Gatsby' cologne advertised in The New Yorker's 1974 issue
Bertie Bott's Every Flavour Beans from the Harry Potter series