Someone left a ring of dried coffee on the counter this morning, a perfect brown circle where the mug had been sitting, and I stood there looking at it longer than a person should look at a stain.
The mug itself is nothing. Ceramic, chipped at the lip, a faded logo from a bank that merged with another bank years ago. My daughter poured me the coffee, said careful, it's hot, and steam came off the surface in a thin curl that bent when the heat kicked on. That curl. That's the part I can't get past anymore.
Up there, the whole atmosphere is a blue line at the edge of the planet, and it's thin. Thinner than you'd want to know. If Earth were the size of that mug, the air you breathe would be a film narrower than the glaze on the ceramic, and past it, immediately, nothing. No warmth. No steam bends in a vacuum because there's nothing to bend into.
So a hot drink is, physically, a strange thing to have. You take water, and you make it hold heat, and for a few minutes you carry a small pocket of a livable temperature around in your two hands, on a rock where almost nowhere else is livable at all.
She drank hers fast because she was late. Left the mug in the sink, left the ring on the counter, didn't think about it once.
I wiped the ring away with my thumb. Then I sat down and wrapped my hands around my own mug while it was still warm, because I know exactly how narrow the warm part is, and how much dark is on the other side of the glaze.