The new Fogger V4 has a glass tank and is made for a dual coil set-up, perfect for sub-ohms. I have a two Kayfun clones and an Aqua. The Aqua is much better suited for sub-ohms but it is tricky to build and fill. I like the vape from the aqua, the juice flow and air flow controls but it only holds maybe 2ml. I'll be getting a fogger at some point cause it looks much easier to build and fill!