New digital vending machines that hype their novelty are designed to inspire viral sharing, industry experts say. Coca-Cola's machines have set the industry mark in Singapore, trading Cokes for hugs, and in Belgium, where acting as a vending-machine-instructed agent earned participants tickets to "Skyfall." Other brands such as Douwe Egberts are waking up to the connection, building machines that dispense coffee for yawns and reaping a viral whirlwind, writes Gabriel Beltrone.

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