The one nagging question that no one has ever definitively answered: why a "cup" of
coffee is 5 ounces.
My theory has been that's what grandma's china
tea cups hold.
Is there another answer?
Serving size has always been a marketing mystery to me as well. As I learned to cook, a cup
by volume was 8 fluid ounces. It's likely a cup at home held 8 ounces and was filled with 6 ounces for room
to add cream and sugar. During my 30 plus years involved with beverage equipment and preparation
I have heard the serving
size/volume at both 5 and 6 ounces (never 8). My educated guess
is that the number comes from a division of the final liquid
As an example: If 68 ounces of water were dispensed
over 4 ounces of ground coffee, the finished
yield of brewed beverage (one
ounce of coffee absorbs approximately two ounces of water) would be approximately 60 ounces. This is easily
divided as 5 -12 ounce servings, 6 -10 ounce servings, 10 - 6 ounce servings, or 12 - 5 ounce servings to
determine a cost per serving.
And Grandmother's tea cup started it all.