A kind of carbon dioxide · also called Cardice, solid carbon dioxide
About
Solid carbon dioxide is noticeably dense, packing about 12.5 ounces into a single standard measuring cup.
Dry ice has a typical bulk density of about 94 pounds per cubic foot (1.5 g/mL), with a single US cup weighing around 12.5 ounces (355 g). This makes it significantly denser than regular water ice, which weighs only about 7.7 ounces per cup (218 g) and floats in liquid water. Because dry ice turns directly from a solid into carbon dioxide gas, a compact block takes up minimal storage space and leaves no liquid behind as it warms.
From Wikipedia
Dry ice is the solid form of carbon dioxide. It is commonly used for temporary refrigeration as CO2 does not have a liquid state at normal atmospheric pressure and sublimes directly from the solid state to the gas state.
Read more on Wikipedia →Text from Wikipedia’s “Dry ice” article, CC BY-SA 4.0.
One cup weighs
12.5 oz (355 g)
Quick answer
One US cup of dry ice weighs about 12.5 ounces (355 g). That makes it roughly one and a half times heavier than the same volume of liquid water.
Typical figures, the same ones every comparison on the site uses; real ones vary.
Compare it
Next to anything: a person, a car, another carbon dioxide.