This is how movie theaters make their money...

“Did you know at movie theaters: popcorn yields more than 90 cents of profit on every dollar of popcorn sold? It also serves to make customers thirsty for sodas, another high-margin product.”

“…one theater chain executive went so far as to describe the cup holder mounted on each seat, which allows customers to park their soda while returning to the concession stand for more popcorn, as "the most important technological innovation since sound." He also credited the extra salt added into the buttery topping on popcorn as the "secret" to extending the popcorn-soda-popcorn cycle throughout the movie.”

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