Brazilian agency Loducca surprised some unsuspecting elevator riders with a pitstop at the office. Near one of the floor buttons, a special message appeared promising a surprise if they decided to press it. The doors would open up to the Red Bull Drive-Thru, a vending machine dispensing the energy drink for free. The buttons were labeled differently depending on the time of day, and the whole idea was to promote the fact that Red Bull isn't just a picker-upper during the party hours--it helps you stay energized during your work day too.