It's been bugging me for a while now and wanted to throw it out to you guys. Sorry I didn't get a better shot of it while I was there, but I think you can probably get the idea from this...
It was in an old hospital/tuberculosis hospital. It was two glass containers that reached all the way to the ceiling, which was approximately 10 feet tall. The stuff on the ground around it was spilled out of the one side so it looked to be something like sand (not sure if it was a liquid at one point or not?)
http://www.youtube.com/watch?v=VTPMSyj_W8c&feature=player_embedded