A device for enabling the unscrewing of a cap from a bottle or jar is disclosed. The device is in the form of a somewhat elongated body in which a releasably engageable cam member and a torsion spring are located. The body is arranged to be grasped by a user of the device. The body includes a pair of cavities, each arranged for receipt of a cap of a bottle or jar therein. The cam member has a pair of ridged or serrated surfaces which are normally biased into the cavities by the spring to releasably engage a portion of the periphery of a cap disposed within either cavity.