Ok I gotcha. I didn't even know there were metal tanks so thats cool to know. You liking them at all over the glass ones? I just worry about the tightening because I did happen to have a small leak yesterday between the atomizer and the adapter on the VTR. Seemed like maybe it loosed in my pocket and the juice got around the rim. Buzzkill to hear about cinnamon though, that's one of my favorite scents/flavors in general haha.
Glass is nice because you can see your juice level