Why is the bottom of the glass wine bottle concave

At present, many glass wine bottles on the market have concave bottoms. What are the advantages of concave bottoms for wine storage? Why do designers use concave design? Let's learn about the secrets of concave bottle bottoms:
Reason 1: During the storage of wine in glass wine bottles, due to a series of physical and chemical changes in the wine liquid, tartar and pigmentation will be produced as a result of these changes. When the bottle stands, these sediments will settle to the bottom. If the bottom of the bottle is flat, the sediment will be easily poured into the glass together with the wine, but if the bottle is mountain-shaped, the sediment will settle in the depression, and it will not happen. The problem with the wine being poured into the glass.
Reason 2: The concave curved surface is stronger, and the pits make the bottom of the glass wine bottle as strong as the bottle wall, which is also designed to prevent the wine bottle from exploding.
Reason three: In wine serving etiquette, the pit also provides convenience and balance for the sommelier during the wine serving process.