It's a protective carrier for crackers - to keep them from getting broken when going on a picnic, etc.

BTW, that is not a glass harp - they're simply glasses. Google glass harp to see a real one. They're impressive.

Unfortunately, the effects shown on this video are not from actual projections - these are digitally created. If you follow the link to the MonstersandRockets site, the video there has a link on the lower right side that goes to the Vimeo website where they explain that the video is a digital creation of what is possible. There IS a video of an actual live projection which, although not quite as impressive as this one, is pretty darn impressive in it's own right. Plus the music is better.