Question: what is in a 40?
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. ... Forties are often mentioned in hip-hop and rap culture by rap stars endorsing the "40" Ounce tradition.