A removable washable liner system for headgear. The package includes a substantially cylindrical structure including a diluent chamber and a drug chamber communicating through a valve. The third transistor receives a third signal at its gate, and the fourth transistor receives a fourth signal corresponding to the third signal at its gate. A residual signal is formed by subtracting the prediction of the original video signal from the original video signal in the current frame. In each side of the ramp, there is provided a reinforcing side section, which extends itself in a substantially right angle downwards from the surface of the mid section and from the end section.