Why do many glasses have a ''concave bottom''?

1. The concave bottom has strong anti-wrestling ability

The concave bottom glass is 3.2 times stronger than the flat bottom glass. When two glasses of the same capacity are picked up with both hands and dropped at the same height, the concave bottom glass is safe and reliable, while the flat bottom glass is easy to break, which is the characteristic of the concave bottom glass.

2. The concave bottom glass is very beautiful

The concave bottom glass is of high grade, giving a high-end and beautiful atmosphere.

3. Glasses with a recessed bottom hold "less" in the same volume

A concave bottom glass can hold a lot less. For example, with the same external dimensions, the same 500ml flat-bottom glass can hold 500ml of wine, while the concave-bottom glass can only hold 450ml. This is an illusion given to consumers by manufacturers. It seems that the wine glass is not small, and the capacity is basically sufficient, but it is not enough.