Coupling for personal care device

A first component for a personal care device, the first component comprising a first coupling interface for allowing the first component to be releasably and repeatably coupled to a second component for the personal care device via a second coupling interface of the second component, the first coupling interface comprising a portion of material that can change from a solid or stiff state to a more pliable state with a change in temperature so that the portion of material is deformable and enables the coupling and uncoupling of the first coupling interface and second coupling interface, wherein, during coupling, the portion of material molds or deforms to the shape of the second coupling interface, and wherein reversing the change in temperature changes the portion of material from the more pliable state to the solid or stiff state to provide a force to clamp the first coupling interface and the second coupling interface together.