Perrier is having some fun with T-shirts in this campaign. No copy. No Tag. These ads are hip and stylish but there's very little advertising happening. You could substitute the Perrier with any other beverage. Any other product really. It's hard to say what kind of effect, if any, these type of ads have on consumers. You could argue that if the kids think the product is cool then the advertising did it's job. But then if the kids aren't buying any Perrier how well did it actually work?