does a fluid ounce of water weigh an ounce
Fluid ounce The fluid ounce is distinct from the ounce as a unit of weight or mass, although it is sometimes referred to simply as an "ounce" where context makes the meaning clear, such as ounces in a bottle.
Standard drink For example, in the United States, a standard drink contains about 14 grams of alcohol.[1] This corresponds to a 12-US-fluid-ounce (350 mL) glass of beer, a 5-US-fluid-ounce (150 mL) glass of 12% wine, or a 1.5-US-fluid-ounce (44 mL) glass of spirit.[2][n 1]