There is a new bcc Glassomizer that looks like a cross between a Vivi Nova SVT and maybe a smok Pyrex DCT but it takes the Protank replacement heads, or I guess the new Kanger universal Protank/Evod heads would also work. Here is a Hyper Tank article if you want to check them out. The aluminum sleeve around the tank is a good mm thick and comes in the usual colors. I was a little skeptical at first because it is so similar to that Raven nest copy FT K2 tank, but it has a glass pyrex tank and "Hyper Tank Glassomizer" etched into the top cap wrapping around the drip tip so I would imagine it is better quality, although I haven't tried the K2 tank so I don't really know its quality, it may be pretty nice for all I know. But anyway, I put it on my 134 and there it stays, it's been in rotation now with 3 other mods for a good 3 weeks and I have only changed the head once. Even at 6.5w it puts out some serious vapor.