Question: are in a 40 ounce beer?
Answer: In the American vernacular, a forty-ounce or simply forty is a glass or plastic bottle that holds 40 US fluid ounces (1,200 millilitres; 2 1⁄2 US pints) of malt liquor. ... When American suburban youth adopted the habit of drinking malt liquor, drug counselors began to refer to "40s" as "liquid crack" and "date-rape brew".