South African vending machine gives you free coffee when you yawn [Video]

The vending machine shown above was built by advertising agency Direct for Douwe Egberts, a coffeemaker company. The vending machine was placed in O.R. Tambo International Airport near Johannesburg, South Africa, and it uses a camera and facial recognition to give free coffee to anyone that yawns.

I wonder if there is a limit to how many times you can yawn to get free coffee.

[via Neatorama]

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