Barrelfuls is a term used to describe the amounts of liquid that are produced from a distillery. It is usually used to refer to the large barrels of alcohol that are produced in a distillery, such as whiskey, rum, or other spirits. Barrelfuls are typically measured in gallons and can range from a few gallons to several hundred gallons. The term is also used to refer to the amount of liquid that is stored in a barrel, which can be used for aging or storing the alcohol.