How does the bottom of the bottle and the thickness of the cup have nothing to do with the quality of the wine?

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During the Spring Festival holiday, wine is an indispensable beverage for every family reunion. Compared to strong white wine, many people now choose to drink wine. It is said that by observing the degree of depression of the bottom of the wine bottle or the degree of wine hanging, it is possible to distinguish the quality of the wine. So, are these statements reliable? How should consumers buy better quality wines?

First of all, in response to the saying that the deeper the bottom of the bottle is, the better the wine quality is. The Chinese wine expert and associate professor of the School of Food Science and Engineering of Beijing Agricultural College Li Demei said that the depth of the bottom of the wine bottle is closely related to the blowing process. The grooved curve makes the bottom of the bottle and the bottle stronger, and it is also more convenient for transportation and storage management. However, it is not possible to judge the quality of the wine by using the depth of the bottom of the bottle. Fang Yulin, dean of the Wine College of Northwest A&F University, also said that in the early days, due to the limitation of winemaking level and technical conditions, the impurities in the wine could not be completely filtered. The design of the groove can effectively collect impurities and impurities during pouring. Slowly slide from the bottom of the groove to the shoulder of the bottle to prevent the sediment from rising from the bottom of the bottle from turbid. But nowadays, the improvement of the technical level has been able to filter out impurities in the wine to the utmost extent. That is to say, the degree of depression of the bottom of the bottle does not affect the quality of the wine, and it has nothing to do with the quality of the wine.

Others believe that wine hanging cups can show the quality of wine, in fact, this statement is also not credible. In the wine industry, there is a saying that “tears of wine” means that the cup that holds the wine is gently shaken, and a liquid film appears on the wall of the cup above the liquid surface. The droplets will eventually flow back into the cup. In Chinese, this phenomenon is called "hanging cups." However, there is no necessary connection between the phenomenon of hanging cups and the quality of wine. The hanging cup is the "Marangoni effect" caused by the surface tension of the liquid, that is, the evaporation rate of the alcohol is higher than that of the water. After the alcohol is volatilized, the surface tension of the moisture in the wine wall of the wine glass will become larger and larger. Under the action of surface tension, the liquor is pulled into a series of "tears tears", and slowly descends under the weight of its own, thus forming a so-called "hanging cup" phenomenon. From this point of view, it is not possible to judge the quality of wine by hanging the cup.

So, how should consumers buy better quality wines? Wu Ding, a professor at the Department of Bioengineering, School of Food Science and Engineering, Nanjing University of Finance and Economics, suggested that it is best to choose a big brand. Large enterprises pay attention to credibility, protect brands, and generally do not fake. In addition, Yan Xiaodong, director of the Jiangsu Nutrition Association's Public Dietitian Training Center, also reminded that when looking for wine, look at the ingredients list. “If you write 100% grape juice and a trace of sulfur dioxide, it is wine. But if it is written with flavor and cyclamate, there are other ingredients, such as grape liqueur, grape juice, this plausible, It is not an authentic wine."

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