Lava Lamp is a recommended character recommended by simondomino in Episode 14. He/She was seen, along with some other recommended characters jumping in a vat of hydrochloric acid, trying to retrieve Bally and Marble from it.
Lava Lamp is based of the real life lava lamps. He/She has what is presumed to be plum and violet coloured wax inside, with a dark gray holder and top. Unlike the real life counterpart, however, Lava Lamp doesn't seem to need heating from a light bulb, or rather anything to have the coloured wax working. Lava Lamp was one of the characters to be in BFDIA 4, but without limbs and red instead of purple.