if you like the serpent mini, you should check out the oumier whitebone mini. from everything i've read, it's almost exactly like the serpent mini, except it has glass windows in the chimney, so you can see your coils. i love mine, and haven't really taken it off since i've gotten it. never leaks, even when on its side for a prolonged periods.

i'm looking into getting a genesis style next, like the wotofo avocado :)