The value does not wait for the number of years. In the United States, Mistablik is a high school student who had the idea of turning his locker into a real beverage dispenser. So he created a small distributor, housed on the high part of his locker, which allows him to make a small break with his friends between two courses.
Mistablik worked from an Arduino chip to build his "Soda Locker". We love the idea, fun and creative, that you can find more detail on the post Instructables project.