To promote Limon & Nada, Coca-Cola created 18 vending machines around Spain that gave people a discount when the temperatures rise. Machines were strategically placed in water parks and outdoor attractions. Three prices are shown depending on the temperature; at to 25°, the cans of lemonade cost 2 euros. At 26-29°, they are around 30% cheaper at 1.40 euros, and when the temperature reaches 30° they are half price at just 1 euro.

via PSFK.