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Print ad.
Print ad.
Moisture sensitive billboard. Bottle trigger compresses and water is spayed onto billboard; while it is wet background is a clean white, when it dries it looks dirty again.
Bus shelter / bird feeder. Bus shelter's ad copy talks about the dangerous contaminates birds can leave on food, and the bird feeder attracts live birds to complete the message.
Moisture sensitive billboard. When it rains the type appears to run.
