But since launching on the market last summer, Gik has shaken up the industry and sold close to 100,000 bottles to clients in some 25 countries, becoming something of a must-have tipple among young hipsters.

But now, the producers have been told they cannot market their produce as ‘wine’ because it is the wrong colour.

"It is absurd because its composition is 100 percent grape," explain the entrepreneurs behind the product.

The vino is created from a selection of Spanish grape varieties and then turned a deep electric blue hue with the addition of anthyocyacin, a natural pigment extracted from grape skin, and indigo, a natural dye derived from the woad plant.