lava lamp

thingiverse

Humans use a lava lamp as a stylish accent piece, bringing eye-catching visuals into any space. The lamp itself consists of globs of tinted wax nestled within a glass container overflowing with transparent or partially opaque liquid; as the temperature nears boiling from a shining incandescent light source below, the wax masses shift between rising and sinking phases due to changes in their respective densities.