Abstract: Liquid products such as automotive fuel system cleaners, differential gear case oil, and brake line antifreeze can be delivered to hard-to-reach inlets on the automobile or reservoir by storing the liquid in a pressurized cannister of small enough size to permit it to be hand-held and by then inserting the remote end of a flexible hose leading from the actuator head of the cannister into the inlet itself. When the actuator head is thereupon depressed, the propellant forces the liquid out of the cannister and into the inlet via the hose while the cannister remains essentially upright and held at a convenient distance from the inlet being serviced. In a particularly preferred form of the invention, a total release lever may be flipped up at the time of discharge to depress the actuator head and to maintain it in its fully depressed condition until the contents have been completely released from the cannister.