decode entertainment on Instagram: "Coca-Cola’s most famous “free ad” came from Pepsi itself. During a shipment, a Pepsi delivery driver was caught on camera secretly drinking a can of Coca-Cola. The clip spread fast, turning into viral publicity that Coke didn’t pay a cent for. For Coca-Cola, it was priceless marketing. A rival’s own employee choosing Coke over Pepsi sent a stronger message than any commercial ever could. It remains one of the most talked-about moments in the long-running Cola