I'm surprised no one has recommended Vapeonly BCC mini tanks yet.
Cons: They cost more than the average clearomizer style tank. The mini size doesn't hold much juice.
(There is a 3.5 ml size available also, but I haven't tried it so can't comment on it). They don't seem to be as easy to find as other brands. (I've bought mine from litecigusa.net, a company I highly recommend. I think clouds of vapor, smokey's vapor cellar and mad vapes have them too.)
Pros: They've been the most low maintenance tank I've tried by far. They are more stylish and sleek than others. I've had zero issues with leaking, gurgling, etc... even with 100% VG liquid. Drip tip can be changed out (originally was a selling point for me because I have several art glass drip tips I like to use, however, the wide/flat drip tip is surprisingly comfortable).
After having been using Vision Vivi Mini's with solid aluminum tank bodies for a while now, I also found the lighter weight of the Vapeonly to be a nice change. But the main thing for me was NO leaks and NO gurgles... Just fill, vape, relax.