Bigbruin.com takes a look at the POW Audio Mo Expandable Wireless Speaker
A quote from the article:
One of the cool features of the POW Audio Mo speaker is that expands thanks to what they call WaveBloom, a rubber membrane of sorts that attaches the base to the top of the housing (the darker grey band separating the left from right in the image above). You can keep the speakers collapsed to make them more portable, but then expand them to increase the internal volume and enhance the sound produced.POW Audio Mo Expandable Wireless Speaker Review