Maybe you had a lava lamp in your college dorm room. Perhaps it sat on one of those spools that used to have industrial cables wrapped around it. Was there a "Frampton Comes Alive" poster on your wall? Did you have beads instead of a door? How many fringes did your leather jacket have? Now that you've grown up and wear fringeless jackets made out sustainable materials and have proper doors with knobs, you may want to find a way to get rid of your old lava lamp.
The materials inside the lava lamp are a trade secret. The patent for the first lava lamp was made with these materials: "solidified globule of mineral oil, paraffin and a dye as well as paraffin wax or petroleum jell, preferably Ondina 17 with a light paraffin, carbontetrachoride, a dye and the paraffin wax or petroleum jelly." According to lava lamp manufacturers, the material inside is non-hazardous, but they do have the poison hotline number next to this information. I'd assume that you shouldn't drink it at the very least.