The eXpromizer is very similar to the Kayfun, except that it is filled Protank style.
You can buy a glass tank separately, but I cannot recommend it. The glass is what holds the tank together, and it's way too thin. Also, the o-rings are too weak.
With a plastic or steel tank, it's a very good atomizer, though.
Thanks; that's one to add to the list:

heck! It's even built to LOOK like a protank;