The RSBT II by Smok is a rebuildable tank atomizer built for vapor production. It features an Aqua-styled dual-coil build deck with a Kayfun-esque chimney. The airlflow is adjustable and hits the coils directly from the bottom, using a slotted opening to reduce leaking of thicker liquids.
Great for all your liquids because of the fairly thick borosilicate glass, you won't have to be concerned about e-liquids known to crack tanks. To protect the glass, the tank uses a stainless steel outer tube with a window cut on either side to show how much e-liquid is left in the tank.
Also, no more worries about losing your fill port screws like on some other tanks, as the RSBT II fills from the top. Just slide the glass into place, close off the airflow, and fill to the top. Screw the stainless cover and you're all set.