I just watched this video from Dan Rojas of
http://greenpowerscience.com/.
Apart from potentially being a great way to make presents or even build a residual income stream for homesteaders, I thought it was a great way to make a set of drinking glasses, glass funnels, or even a glass cheese mold (instead of the standard plastic ones). I think the technique has potential to help us reduce toxicity.
That was a really great video.