Alcoholic drink which contains a very high level of alcohol and "does not contain any added flavoring" is commonly called a neutral spirit. Generally, any distilled alcoholic beverage of 170 US proof or higher is considered to be a neutral spirit. Most yeasts cannot reproduce when the concentration of alcohol is higher than about 18%, so that is the practical limit for the strength of fermented drinks such as wine, beer, and sake. However, some strains of yeast have been developed that can reproduce in solutions of up to 25% ABV. Shot sizes vary significantly from country to country. In the United
Barley wine Barley wine Barley wine is a style of strong ale of between 6-11% or 8-12% alcohol by volume. It is also sometimes written as one word, barleywine. In Ancient Armenia, a style of fermented grain beverage was referred to as "κρίθινος οἶνος" ("krithinos oinos") - "barley wine", by the Greek historian Xenophon, who mentioned to have experienced it, while being in Armenia, in his work "Anabasis" and Polybius in his work "The Histories". These barley wines would be dissimilar to modern examples as their mention predates the use of hops (a key component in modern barley wines) by several centuries.