We used this Magic Window mailer to promote our presence at this year's DMA Conference. The window features several tchochkes with the message, "Is this what your DMA visit is worth?". When you pull on the bottom tab, the image changes, and the message, "This year, why not leave DMA with something that can really improve your business" appears in its' place. The flap at the bottom then unfolds to reveal the call to action and booth number.

 

See it in action >>