A long time ago, the wine bottle made by our ancestors was round, with a big belly, a small bottom and a small contact area at the lower end, which was probably equivalent to a chemically heated vessel. The only place suitable for placing these wine bottles is the beach, or make another concave pot-shaped container to place them. Later, the bottle developed to slimming, but it was also slender and unstable. In order to stabilize the bottle, the bottom is made concave to increase the weight of the bottom and lower the center of gravity. Nowadays, bottles are getting thinner and thinner, and there are obvious grooves at the bottom, which makes them more stable.

Second, increase the contact area between sediment and bottle bottom.

The longer the wine is aged, impurities such as pigments, tannins and tartar crystals may appear, and there are grooves at the bottom, which can increase the contact area between the sediment and the bottom of the bottle, so that it can be attached to it more effectively and remove impurities.