The unit of a "cup" there is sourced from the US government, and thus it's well known to be a volumetric measurement that is equal to 1/672 of a standard oil ba

The unit of a "cup" there is sourced from the US government, and thus it's well known to be a volumetric measurement that is equal to 1/672 of a standard oil barrel's volume. It's not vague for US customers at least. It hurts my soul that it's using a volumetric measurement for leafy food, like if you cut lettuce leaves into pieces, they have the same nutrients but take up way less space, so 3 cups of roughly cut lettuce leaves is different from 3 cups of finely chopped lettuce leaves, which is also different from 3 cups of uncut lettuce leaves. Just give it to us in mass or calories please (like grams or fractions of an oil barrel's mass, or fraction of a barrel of oil's calories and nutrients).