With Karstens change to varHelix, the bottle will move along x
(I renamed selected to bottle...)

I guess you are trying to move the bottle along x, to match the rotation of the helix?

Or are you trying to move the bottle around the helix?

To form the helix curve, it needs x,y,z points feeding interpcurve...
I guess you could output dx, dy, and dz to the move node...

- Brian, confused