A fluid transfer device for transferring fluid from a first fluid container to a second fluid container such as a piercing member protection device. The coating comprises a coloured layer and an overcoat layer. A tub is associated to the cabinet. A magnetic guide plate is located to guide disturbing magnetic flux in predetermined directions. The asymmetric gate dielectric layer has a first thickness between the gate electrode and the drain region and a second thickness between the gate electrode and the source region, wherein the first thickness is thicker than the second thickness.