Whiskey is a popular alcoholic spirit that's made from fermented wheat, barley, corn, or rye. One of today's well-known whiskey brands is Fireball Cinnamon Whisky, but it technically isn't whiskey at all.

For alcohol to be a true whiskey, it must have an alcohol by volume (ABV) of at least 40%. Each whiskey type is differentiated based on what grain it's made with, where it originates, how it's aged, and how it's blended, but the ABV rule is universal.

Fireball Whisky is made with Canadian whisky, cinnamon flavoring, and sweeteners, but the Canadian whisky is diluted and the drink has an ABV of only 33%. However, Fireball is categorized as a flavored whiskey, which means it only needs to be 30% ABV.