really enjoying this piece, it does feel nice and hearty and the welds seem to be superior than most of the other Chinese glass manufacturers you see on DHgate. I was confused at first if TAG was American made glass, as some of their blog posts seemed to suggest that. However, when I messaged them they didn't try to deceive me. They clarified that their pieces are made in China, but the glass is sourced from the US. The slyme colors all have to be ordered from Trautman Art Glass, which is in Oregon.
So while you can probably get a clear glass imitation of these klein rigs on other sites, I'm pretty sure this is a more durable glass piece and, most importantly, slyme is the real deal, not some knock off glass from China.