Hero invented the first vending machine in the first century C.E., hoping to deter dishonest visitors from taking too much of the temple's holy water. The machine worked through a lever system: the deposited coin would roll onto a lever, weighing it down so that the other end lifted a plug from a container of holy water. When the coin fell off the lever, the flow of holy water ceased.
The First Vending Machine
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Key Facts In This Video
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