2 liters
You use a spoon to eat the soup in a soup bowl
it's cup
A soup bowl usually has a capacity of around 2 cups. If it were 2 quarts, it would be a very large soup bowl.
Usually about 1.5 cups
This depends on the size of the soup bowl in question. The capacity could be measured using either fluid ounces, cups, or pints.
Two explanations, first to be 'in the soup', means to be in trouble, Second, 'to soup up' means to improve the capacity for speed or performance.
Ounces
Yes, what else?
liters
1 pint-1 quart is 2 pints (a mug has the capacity of about half a pint)
Volume of liquids and capacity of containers are typically measured in milliliters.
Often between 300 and 500ml but it varies greatly. A serving of soup is generally quoted as 250ml or a U.S. cup (8oz). Many restaurants serve about this amount in a bowl capable of holding much more.