A kind of metal · also called Aluminium

About
Aluminum is a lightweight, silvery metal that weighs only about one-third as much as the same volume of steel.
Aluminum has a density of about 169 pounds per cubic foot (2.7 grams per milliliter). It takes up the exact same amount of space as steel or iron while providing roughly one-third of the weight. Because of this low density, large sheets and blocks of aluminum feel surprisingly light to hold compared to most other metals.
From Wikipedia
Aluminium or aluminum is a chemical element; it has symbol Al and atomic number 13. It has a density lower than other common metals, about one-third that of steel.
Read more on Wikipedia →Text from Wikipedia’s “Aluminium” article, CC BY-SA 4.0.
One cup weighs
1.41 lb (639 g)
Quick answer
One US cup of solid aluminum weighs about 1.41 pounds (639 grams). That is roughly equal to the weight of three standard baseballs.
Typical figures, the same ones every comparison on the site uses; real ones vary.
More like solid aluminum
Compare it
Next to anything: a person, a car, another metal.