Black Vortex is a good name, and that bong is freaking amazing, i would name it...
Black Smoke Bong
Swirly Smokeriser
The RUSHan Bong
Blinder Bong
(i started twisting became dizzy and looked at it and i started feeling a weird rush and started feeling blind when i looked at the bong, thats where the last two naems came from)
my advice, sit down, get smoked, look at the bong, have an epiphany and then youll find the true bong name.... maybe you can call it
The Epiphany Bong
or
The Epiphany Swirls