An overmolding method for making thermoplastics articles of manufacture, for the perfumery and cosmetics fields, comprises the steps of: a) providing a first plastics material in a form suitable for an injection molding; b) providing an injection press, and molding by the injection press the first plastics material thereby providing a raw molded article of manufacture; c) associating with the raw article of manufacture made in said molding step: d) at least an insert element of a material different from the plastics material thereby providing an assembly of the raw molded article of manufacture and the insert element; and e) overmolding on the assembly at least a second plastics material thereby providing a finished molded article of manufacture.