The Artemas Locking Tank with Etched Look - Tank Only.
The SmokTech Dual Coil 510 Cartomizer and tank system has became a very popular favorite for some good reasons, the flavor, the reliability, ease of the draw and simply the convenience. This tank takes it a step farther. The Carto locks into place so it can't slide off the tank until you unlock it. Combine these things with the cost and they are a great value to boot.
Warranty Info: The Cartomizers have a DOA guaranty only and the tank comes with a 14 day warranty.