A Denver couple transformed discarded plastic cups from Hasbro into a global sport phenomenon called 'Sport Stacking', investing their life savings of $43,000 in 1998. Through strategic marketing, school demonstrations, and competition infrastructure, they built Speed Stacks LLC into a successful business that reached thousands of schools worldwide and garnered mainstream media attention.

https://defector.com/if-you-ever-stacked-cups-in-gym-class-blame-my-dad

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