There are many types of wine glasses, the more common ones are 180ml and 240ml. 360ml. If it is 180ml, it is because the bottom is larger. So it's almost about 1/4.

Information expansion:

The red wine glass has a handle at the bottom. The upper body is deeper than the white wine glass, and it is fatter and wider. Mainly used to hold red wine and cocktails made with it. The main materials of red wine glasses are crystal and glass. The aroma and taste brought by crystal glasses and glass glasses will be slightly different. The reason is mainly due to the different roughness of the surfaces of the two.

Differences between manual blowing and machine blowing:

Appearance differences:

Mechanical products - those seen on the market are basically completely exposed products. The shape is single, there are few styles, the product is bulky, the streamlinedness of the product is poor, and the joint between the cup and the bottom is too stiff, but the consistency of the product size and specifications is good, there are no bubbles and water ripples, and the firmness is poor.

Artificially blown products - plain material products are supplemented with various decorations, with many changes in shapes, rich colors and styles, lighter products, good product streamlines, obvious beauty, and the product itself can be designed tightly. Following the fashion trend of market consumption, it can give consumers more choices, satisfy personalized consumption propositions to the greatest extent, has bubbles and water ripples, and has good durability.

When made by hand, there will be fine stripes and a few bubbles, as well as subtle differences in black and white spots of chemical materials and decoration. The existence of bubbles and stripes is also one of the important differences between artificial and machine-made glass craftsmanship, and is also a useful tool for collectors to identify. Strong evidence of no collectible value.

Reference: Baidu Encyclopedia-Red Wine Glass