Wine tears do not award points: the physics in your glass

20 October 2026 · Vikipedia

Myth · Wine. Someone swirls a glass, watches the trails running down it and announces: “Look at those legs. This must be excellent.” The scene has authority, flattering lighting and one small problem: those legs have not tasted the wine.

The phenomenon is fascinating. Turning it into a verdict on a bottle takes rather more evidence. Your nose and mouth are useful here; an imaginary scoring calculator is less so.

First it climbs; then it cries

Wine wets the inside of the glass, leaving a thin film. Evaporation changes its composition and temperature. These differences alter surface tension, producing forces that can draw liquid up the wall and feed a ridge of wine. As that accumulation becomes unstable, droplets form and fall under gravity. Research by Hosoi and Bush and the experimental review published in 2018 describe this behaviour. It involves the Marangoni effect, with more supporting actors than the name suggests.

Picture a surface pulling with different strengths in different places. It is a useful way to imagine the movement, not evidence that the wine has muscles or is trying to escape dinner.

Alcohol is involved, but it does not work alone

The popular explanation often stops at alcohol evaporation. Venerus and Nieto Simavilla’s 2015 study used thermal imaging and showed that evaporative cooling also makes an important contribution. Temperature, composition and the liquid’s behaviour on the glass all matter.

Comparing two glasses without controlling conditions is therefore not a laboratory measurement. More conspicuous tears cannot give you a precise alcohol reading. And moving from “alcohol is involved” to “this proves quality” is a leap the physics has not approved.

The questions those droplets cannot answer

Are the aromas interesting? Does the acidity work? Is the alcohol integrated, or does it overwhelm everything else? Would you like another sip? Counting trails answers none of these.

Nor does replacing one shortcut with another help. “More tears means more glycerol” does not, on its own, explain this mechanism. The cited papers investigate the movement of liquid films. They do not propose a wine excellence scale.

One glass, two moments and no score

Watch the glass wall just after swirling, then look again after leaving it still. First you spread a liquid film; then you observe how it develops. The comparison helps you follow the phenomenon, not measure quality or deduce an exact composition.

If comparing two wines, at least use similar glasses and serving conditions. Otherwise several things change simultaneously and you cannot know which explains the difference. Dinner-table experiments often have abundant enthusiasm and a rather small department for controlling variables.

Body is tasted, not counted in droplets

Body describes an impression on the palate. Comparing a lighter or weightier sensation can help, provided we explain what we notice. Watching streaks and announcing that sensation before drinking skips precisely the part we intend to assess.

If you see small solids in the bottle, we are no longer discussing tears: read about tartrate crystals. Distinguishing moving liquid from a forming solid deposit may seem elementary; it also stops every visual curiosity being filed under the same explanation.

Enjoy the show; keep the verdict for the tasting

Look at the glass, by all means. Then smell, taste and compare what you notice. If you want the declared alcohol content, the label does a respectable job without requiring three minutes of droplet surveillance.

The useful takeaway: wine tears tell a story about evaporation, surfaces and gravity. To decide whether the wine works for you, you still need to taste it. The glass may be crying; your judgement need not join in.

Sources and review

Expanded and reviewed on 20 October 2026. Explanation checked against the cited physics research. The suggested observation is not an analysis of alcohol, glycerol or quality.