Abstract: A method of constructing a desiccant pot by trapping a spun-bonded low density membrane between two separate parts constituting either the pot lid or the pot body, these two separate parts being made of high density plastic, and then fusing the membrane and the separate parts together, in which one of the separate parts has upon its touching surface an energy directing protrusion, arranged such that when the three components are assembled so that the two separate body and lid parts are pressed together with the membrane between, the energy directing protrusion extends from one touching surface to the other to space them slightly apart.

Abstract: A desiccant stopper suitable for use with a bottle of pills or the like, which stopper is of a thermoplastics material and is in the form of a pot at least one end face of which is made from a fibrous fabric sheet of a plastic material attached around its periphery to either the body of the pot or to a lid for the pot body, and wherein the attachment is effected by the sheet being embedded within the material of the body or lid, or both. It also proposes two methods by which such a structure can be manufactured, one involving holding the sheet in place while the body or lid material is injection-molded around it, the other involving sonic fusion of the body/lid material around the sheet.