Which product holds the Guinness World Record for the fastest retail product to reach one million sales?

The world of retail and product development has seen some incredible record-breaking achievements throughout history. From the most expensive retail product ever sold to the fastest product to reach a billion users, these milestones showcase the extraordinary potential of innovative product development and strategic branding. Test your knowledge about famous products that have earned their place in the record books!

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Apple iPhone 6, reaching one million sales in 3 days
Pokémon Black and White video games, reaching one million sales in 24 hours
Harry Potter and the Deathly Hallows book, reaching one million sales in 7 hours
PlayStation 5 console, reaching one million sales in 5 days