So a few years back, Coca Cola placed these devices in malls with a screen and a webcam.
I was fortunate enough to come across these. On one end you could see a Pakistani mall with people just like us wondering what's going on. You basically had to put your hand on the screen and when the person from the other side also did that, you'd get a coke! The message was simple but effective.
Coke has always done campaigning right. #TasteTheFeeling