3M was so sure their Security Glass was unbreakable, they placed 3 million dollars of cash between panes of transit glass treated with a shatter-resistant coating. Only $500 of real currency stacked on top of fake money.
People could only use their feet to break it. A security guard was nearby to make sure no one broke the rules and that people couldn’t get to keep the money if they broke it.
This is probably one of the most known creative ads and therefore cannot be missed on CreativeCriminals.com