Firstly, the wine dregs are precipitated.
In early wine brewing, the groove of wine bottle was mainly used to accumulate sediment in wine.
Because in the early stage of wine brewing, the brewing process is relatively backward, there will still be dregs and peels in the brewed wine, and the grooves at the bottom of the bottle can allow the sediment and tannin crystals in the wine to precipitate at the bottom of the bottle, thus precipitating impurities in high-grade wine.
Although these sediments do not contain substances harmful to human body, for the sake of beauty and taste, high-grade wines will use the depression at the bottom of the bottle to precipitate impurities, and the longer the general wine needs to be stored, the deeper the depression at the bottom of the bottle will be.
Second, keep the external structure stable.
The early wine bottles were all blown by workers, and the depression at the bottom of the bottle was actually a tradition left over from the bottle blowing process.
Although most modern wine bottles are made of models, the bottom of the bottle can not be strictly flat, and it is easy to have small bumps or depressions in the production, which leads to the instability of the wine bottle. Designing the bottom of the bottle as a groove can avoid this problem.
Convenient transportation and storage, the depression at the bottom of each wine bottle can just accommodate the bottle mouth of the next wine bottle, and the wine bottles are stacked in turn, which is more convenient for transportation and storage of wine.
Third, etiquette aesthetics.
Wine has always been synonymous with beauty, and the groove design at the bottom of the bottle also makes the bottle more beautiful!
In foreign countries, the normal way of pouring wine, for example, when the sommelier in a general restaurant pours wine for a guest, he buckles the groove of the bottle with his thumb and holds the bottle with the rest of his fingers. This way of pouring wine is more elegant and beautiful!