Envision Group in Denver has developed a new medium for branded messages.
Reveal’d makes it possible to conceal your message or graphic on any glass or mirrored surface, and then reveal it with the application of steam–introduced naturally from shower steam or through artificial means in areas where natural steam does not occur.
In general, I’d say the last thing we need is another place for ads to creep. But in this case, I can see where the reveal might surprise and delight a viewer.