This is for e-cigs, its a 10x 510 connection tank holder I built.
It holds 6x up to 25mm tanks 2x up to 30mm tanks 2 x up to 35mm tanks, totalling 10x tanks in total.
the tanks screw in so you can move it about without them falling out
works with 15% but can use more if you like
I printed it in ABS but will work just as well with PLA
I used supports only to supports the lettering on the front of it.
I designed it on SketchUp Make 2017