This is one of the better direct marketing ideas we've seen in a while. Created by the ad agency Lowe Worldwide, this mailer focuses on the power of customer interaction by incorporating the entire campaign into a clever little package. A sample of Breeze Excel Detergent is contained within a box, which is then wrapped in a white t-shirt. Evidently, the t-shirt gets dirty through snail mail and arrives at the consumers' doorstep ready to be product tested. Simple, smart, and effective!