I will recommend the Protank 2 mini's or the iSmoka (Vapeonly) BCC mini's (with a warning). The PT 2 mini's are glass and will work with any juice, even cinnamon and other problematic flavors that cause plastic tanks to crack. The iSmoka tanks are awesome ... BUT (and it is a pretty big BUT) ... over time the threads wear out and the tank splits right where the threads meet the base of the tank. Also, they won't hold up to stronger juices since they are plastic.
As pointed out by Katya, you will need an adapter to make this work with your current setup. I have used 808-510 adapters without any problem with my tanks. The good news is that the adapter is only about $3 and can be found on many different vendor's websites.
I used the iSmoka tanks for about 5 months before they started splitting at the base, but other wise, they worked flawlessly and I loved them. The iSmoka BCC Megas that I have are still going strong, none of them have exhibited the same symptoms, so I suspect it is something with the minis specifically, maybe the plastic is a little thinner?
Anyway, HTH and as always, YMMV!