tempest in a tea cup
The sun shining on my hot apple cider reveals wondrous physics. Infinitesimally small droplets of water vapour cling to the surface. Those droplets that get away rise up and form little vortexes, spinning tornado like leaving spiral traces on the surface of the liquid. The droplets also refract the sunlight forming fleeting patches or iridescence that the camera just can't quite capture. Tastes yummy too!