A young British entrepreneur has devised a novel way to use the green tea powder known as "matcha," which has already become a popular flavoring in cakes, chocolate and coffees.

James Shillcock's startup business is selling an energy drink that incorporates matcha, which he believes is a healthy alternative to caffeinated beverages such as coffee and conventional energy drinks.

Branded as Vivid Drinks, the product combines matcha powder with such traditional British flavors as pear, rhubarb and elderflower.