I become enriched by the tobacco vapers. Their stuff is cheaper and better. Real glass for the same price as the plastic ones from the ganga guys.
I've been using KangerTech for the tank.
I just got the Aero Tank.
It completely comes apart by unscrewing the middle. Pyrex glass, easy fill.
It is the lipo pens that I end up collecting. It is best to never let them fully discharge. So, I carry a couple of spares. But the tank is big enough to last me for days.
And I have 2 Revolver Auto-pens coming today. Makes it possible to use on my motorbike. No battery button, just inhale.