Measuring Cups
1 Cup
"1 Cup" is equal to 8 fluid ounces in US Standard Volume. It is a measure used in cooking.
A Metric Cup is slightly different: it is 250 milliliters (which is about 8.5 fluid ounces).
Ounces (at 8 oz per cup) 
Tablespoons (at 16 Tbs per cup) 
milliliters (at 250 ml per cup) 


¼ cup  2 oz  4 Tbs  63 ml 
^{1}/_{3} cup  About 2¾ oz  About 5 Tbs  83 ml 
½ cup  4 oz  8 Tbs  125 ml 
^{2}/_{3} cup  About 5¼ oz  About 11 Tbs  167 ml 
¾ cup  6 oz  12 Tbs  188 ml 
1 cup  8 oz  16 Tbs  250 ml 
1 ¼ cup  10 oz  20 Tbs  313 ml 
1 ½ cup  12 oz  24 Tbs  375 ml 
1 ¾ cup  14 oz  28 Tbs  438 ml 
2 cups  16 oz  32 Tbs  500 ml 
(In italics: not exact)
Measuring Cups
Measuring cups are used to measure liquids, or powders like flour or sugar.
As we fill up the measuring cup, we need to look at which number it is filled to.
Here we have 2/3 cup (twothirds of a cup) of milk.
And they can also measure milliliters (ml):
Here we have 150 ml.
It doesn't say "150" ... it says "50" ... but it is halfway between 100 and 200 so we can figure out it is 150 ml.
There are also special ones designed to hold an exact amount, such as these 1/2 cup and 1/4 cup measures.
They can also hold more than "1 Cup" of liquid.
This measuring cup holds up to 4 cups of liquid. If the liquid goes all the way to the 3, then there are 3 cups of liquid. Between the numbers we find fractions of a cup.
2 cups of a liquid is the same thing as 1 pint. So this measuring cup also holds 2 pints (4 cups equals 2 pints).