Small cups in restaurants are usually several.

Small glass used in hotels, with a capacity of 50 ml to 100 ml, weighs about 2 Liang. For liquor, a bottle of 500ml is 500 grams (that is, 1 kg) according to1g. In fact, there will be errors in every water dispenser or when pouring water. Using the distributor, the 50ml scale is equivalent to 1 2 (30 ml), and the 100ml scale is equivalent to 2 pairs (60 ml).