They are sometimes used as a promotional device.

Metallica have made a stand in the past against conventional promotional devices.

He said tobacco, as a promotional device, is no different from chocolate.

"It's mainly a promotional device, but we also use it as a teaching tool."

But this promotional device, like most others, comes with a cost.

Movie series, in fact, are one of this season's strongest promotional devices.

It dawned on him that if packaged together they would make an excellent promotional device.

A book, unlike some other promotional devices, has a long shelf life.

It's a common enough promotional device: a special advertising section to tout a state's economy and attract new businesses.

That show is sometimes considered to have launched the music video as a promotional device.