The stall at Zion Riverside Food Centre that sells iced barley has been in the same corner for as long as I have lived at Blk 90. The auntie knows my order without me saying it — less sweet, extra ice — and slides the cup across the formica with the same flat motion every time. On 18 January, I sat at the table nearest the railing where you can see the river without really looking at it, and ordered barley because the afternoon had turned heavy and my flat felt too still.

I had work on my phone that I was pretending not to think about. Emails from the logistics firm, a roster that needed checking by Monday. I set the phone face-down and watched condensation gather on the outside of the cup. Within minutes a ring formed on the table — a pale outline where the base had sat, widening slightly as the water ran down. I lifted the cup to drink and the ring stayed, empty in the middle, like a small map of where something had been.

The food centre was loud in the ordinary way. Trays clattering, someone calling a number, a fan turning overhead without cooling much. An uncle at the next table finished his lunch and left two rings from his tea cup, one inside the other where he had shifted the glass without thinking. I noticed that the way you notice things when your mind is half on something else — not studying, just receiving.

The barley was good. Not remarkable, not trying to be. Cold enough that my teeth complained on the first sip and then stopped. I drank slowly because I had nowhere to be until four, and because the ring on the table kept drawing my eye. It would dry eventually. Someone would wipe the table or the next person would set a cup inside the same outline without knowing it was there.

I thought about how often I finish a drink before I finish the thought that brought me to the table. The barley cooled. The ring held its shape. I scrolled one email, deleted two, and put the phone away again. The auntie passed with a cloth and wiped the next table over but not mine — I still had half a cup left and she knows the rhythm of when to leave people alone.

When I finally stood to leave, I picked up the cup and looked at the ring it left behind, darker now where the formica showed through the wet. A young man sat down before I had taken three steps. He set his tray in the centre of my ring without looking down. His drink made a new ring inside the old one, smaller, fresher. Two outlines, one inside the other. I watched that for a second longer than I needed to, then walked home along the river path with the taste of barley still cold on my tongue.

Nothing dramatic happened. No lesson, no revelation. Just a hot afternoon, a familiar stall, and the small mark a cup leaves when you set it down and forget to move it until the water has already found its shape. I write it because I will forget by next week, and because the ring was there whether I wrote about it or not — widening slightly, drying at the edges, waiting for the next cup or the auntie's cloth, whichever came first.