Abstract: Provided is a method for volumetric displacement of a predetermined desired volume ?V of target material from a first location to a second location. The method including: (a) providing a rigid control volume having a V0 accommodating a resilient volumetric member coaxially located therein having a target material chamber of volume V1. The target material chamber is confined by an inner surface thereof, and constitutes the first location. The control volume V2 confined between an outer surface of the resilient volumetric member and an inner surface of the rigid control volume. The control volume further includes at least a target material outlet; (b) filling the target material chamber with the target material; (c) introducing a predetermined desired volume ?V of an incompressible auxiliary material into the auxiliary material chamber to apply pressure to the resilient volumetric member.