Hi,
I've got it today with eGo kit. I'm using it right now and like a lot. No leakage, no mess,no pop-up caps or needles and etc. . Very sophisticated and simple design. It goes inside of an atomizer . The kit w/liquid cost me only 60$ (included 2 750 passtrough batteries). Now everything is out of stock. Service,communication and shipping was excellent .
Back to tank it does have a very small piece of filler on the bottom in removable cart and I just check Youtube Smartcart video and it's not "Smart cart" for sure. No way it will leak into mouth or somewhere else. It has a separate airflow pass-trough .
Btw I'm newbie and bought this kit because of this tread. So thanks anyone.