Just picked these up from one of Bob Snodgrass's former students. They're the classic skull and top hat motif, but on heavy black borosilicate. You can clearly see the fume work on these! The black glass really shows it off. Snodgrass is the glassblower credited with sparking the glass pipe movement. He discovered that silver and gold specially sprayed into the glass would change colors. He's the guy that invented color change!!! This technique and many others were pioneered by him. Never one to covet his knowledge, Bob Snodgrass took on many apprentices and now has a huge extended family of glassblowers. You too can learn from the master. Bob Snodgrass offers 2-5 day classes, starting at $275 a day.