Beer Keg Volumes

Heineken mini keg, 19.7 standard drinks, false advertising?
Heineken mini keg claims to be 19.7 standard drinks … A standard drink beer can be defined as 341 ml or 12 ounces of beer (5% alcohol). However, by dividing the volume of the barrel, by volume of a standard drink, you do not does. 5000ml/341ml = 14.66 beer. Is this false advertising, or is my conclusion wrong?
Standard drinks vary from country to country. In the U.S. is different in Germany. They may be passing by German standards, or may be incorrect. A standard drink is also dsependent on many factors … not just volume. In U.S. It relies mainly on the volume of liquor containing 14 g of alcohol. Sometimes it's more than 341 ml, sometimes its less.
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