The housing lid (1) has a deformable element (2) fixed in it which contains a free volume (3) over the surface (4) of the glue stick. The deformable element has an adhesion-deterrent layer (5) near the stick's surface. The volume element accumulates liquid which permeates through the adhesion-deterrent layer. Part of the volume is accessible via a closeable opening from the surrounding area. The liquid-accumulator is connected by a permeable membrane to the elastic element which consists of an elastic wall (9), inside which is a closed air-cushion (10).
