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
Caffeinated alcoholic drink Caffeinated alcoholic drink A caffeinated alcoholic drink is a drink that contains both alcohol (also known formally as ethanol) and caffeine. They often include the ingredients of energy drinks as well. In 2010 and 2011, this type of drink faced criticism for posing health risks to their drinkers. In some places there is a ban on caffeinated alcoholic drinks. Energy drinks are drinks that contain high doses of caffeine and an assortment of ingredients, such as, The counteracting effects of caffeine and alcohol often causes the consumer to drink more than they normally would because of the delayed "drunk" feeling,