The Cubis Pro is Joyetech's updated 4ml iteration of the original Cubis released alongside their new LVC coils and QCS coils. The Cubis is designed with a cup-system airflow which prevents leaking regardless of the orientation and use of the atomizer. It's a truly leak resistant tank. With the return of the LVC coils users will be able to adjust how much E-Liquid their coils are allowing for absorption.
A solid tank!