M PRO 2 is an Updated successor to the reputable M Pro Tank.
It still has the Slide to Open top fill design however they have added 3 steel balls to the top to increase the friction when you slide open and shut the top cap.
With a cleverly designed refilling system it is easy enough to slide with one hand yet stiff enough to prevent accidental loosening.
Each tanks is slightly individual in its colouring but as close to the picture as possible.
This purchase comes with a free Bubbleglass as well as the standard 2ml plastic tank.