McDonald's offered free McFlurry's with heat-activated billboard

When a heatwave hit the Netherlands earlier this month, McDonald’s conjured up a novel way to keep people cool by to creating a heat-activated billboard.
When the temperate at the Damrak in Amsterdam hit a record 38.6 degrees Celsius a panel opened automatically to offer out 100 McFlurry empty cups to passing pedestrians.
They then had to pop into the nearby McDonald’s restaurant to collect their free ice cream. A simple but cooling idea!
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Source: Business Insider