In response to these problems, it is first necessary to determine the capacity of each glass of wine, because different regions and personal preferences may lead to differences in the capacity of wine glasses. Generally speaking, a standard red wine glass has a capacity of about 150ml to 200ml. We divide the total volume of 1.5 liters (or 1500ml) by the volume of each glass of wine which is 150ml. That works out to about 10 glasses of wine. This means that in a 1.5 liter bottle of wine, about 10 glasses of wine can be poured, depending on the volume of each glass and the skill of pouring. While this method provides a rough estimate, it's important to note that different glass sizes and personal pouring styles can have an impact on the final result. Therefore, the actual number of cups may vary slightly. Second, we need to know the capacity of the wine bottle. A standard bottle of red wine is usually 750ml, or 0.75 liters. However, for a 1.5 liter bottle of red wine, it holds 1.5 liters, which is equivalent to 1500 ml.

Finally, it is important to know the drinking glass capacity in different regions. Different cultures and traditions around the world can result in a wide variety of wine glass designs and capacities. Taking some common examples, the capacity of red wine glasses commonly used in Europe is 250ml to 350ml, while the United States is more inclined to the capacity of 250ml to 450ml. In addition, the Asian region also has its unique wine glass culture, which can hold about 150ml to 200ml of red wine.

In summary, a 1.5 liter bottle of red wine can be roughly divided into 8 to 10 glasses, depending on the capacity of each glass and personal pouring skills. The capacity of the wine bottle is 1.5 liters (1500 ml). The capacity of drinking glasses around the world varies due to regional and cultural differences, ranging from 150ml to 450ml.