A fluid dispensing device comprising: a reusable unit (I) comprising: a controller (101) for managing operations and an engine (103) for imparting motion to a fluid transfer element (105) of a fluid transfer system, a first portion of the fluid transfer element (105) being disposed in the reusable unit (I) a depletable unit (II) comprising: a cradle (28) for releasably receiving the reusable unit (I) and a secondary portion of the fluid transfer element (105) of the fluid transfer system, the secondary portion of the fluid transfer element (105) being disposed in the depletable unit (II) and an injection unit (III) wherein transfer of fluid out of the depletable unit (II) occurs when the reusable unit (I) and the depletable unit (II) are coupled in operative association on condition that power is supplied to the engine (103).
