,not as the ones seen in the Prisoner, but it's predecessor of 1963, of which this is a Mathmos replica, just as the original would have been, but in copper metal.
I have five Lava Lamps in my collection, but only two of them are Mathmos, and one is as seen in 93's apartment on THEPRISONER09, and another is a tall square lamp.
There is something soothing about a Lava Lamp, to sit and gaze at a Lava Lamp seems to quieten the mind somehow. Possibly that is the reason why No.2 is seen to have the image of the perpetual Village Guadian on his wall screen in his office.
Yet it can appear to have something malevolent about it, that the wax inside is symbolic of the Village Guadian, a perpetually moving, living 'thing,' that it would do harm to you if it were to ever escape its confines. It is almost as though anyone who owns such a Lava Lamp, and is a fan of the Prisoner, owns his or her own small containment area akin to that somewhere at the bottom of the sea.
I'm Johnny Prisoner enjoying his Lava Lamp, and having done good work for a charity into the bargain!