As part of Coca Cola’s current health “pledge”, they provided people on a flight all with Coke Zero.
Once everyone was seated, they offered people to swap their Coke Zeros with an original full fat Coke, to which many people obliged. What they didn’t notice was that this Coke cup was slightly bigger, and inside it was a Coke Zero cup. An airline announcement then came on informing and showing them that they had in fact been drinking Coke Zero all along. A classic taste test where you swap the consumer’s product with the precision of a magician, and they are amazed at the results. What is more interesting is that by doing it to a couple of hundred people “trapped” in a plane, as opposed to catching people in a supermarket, makes the whole stunt seem a lot more grand and exciting.