Abstract: An apparatus is disclosed for inserting a previously compressed resilient stopper into a bottle and includes a plunger unit having a protrusion; a compressor having a first and second portion with the first portion having a first cavity that has a first aperture and a second aperture and with the second portion having a centering guide. The protrusion has a protrusion length sufficient to push the stopper along the first cavity so as to partially insert the stopper into a mouth of the bottle when the mouth is held against the centering guide. The first cavity has a dimension that compresses the stopper so that it fits into the mouth of the bottle when the stopper is pushed along the first cavity, while permitting the extraction of the compressor away from the stopper and the bottle without extracting the stopper from the mouth.