Innovation at its finest! The very best “cupped” sub ohm tank out there at the moment, this unique tank is inverted from the inside, offering perfectly efficient airflow at the top of the tank. The Cubis was designed to be a no-leak tank, first and foremost, and that is exactly what it is. It offers exceptionally crafted engineering, great flavor, and absolutely no burnt hits. Producing a superiorly smooth hit, it's very simple to keep clean, and filling is ultra convenient due to the top-fill feature. The coil attaches through the top of the unit, enabling the bottom half of the tank to be solid, sturdy, and non-moving for total stability.