Cubic feet
Cubic feet are imperial units of volume. A cubic foot is defined as the volume of a cube with sides one foot in length. It is normally found in the United States for measuring the volume of household items, inner spaces or parcels.
Teaspoon
There is more than one type of teaspoon:
A US teaspoon is 4.93ml: US teaspoon
A UK teaspoon is 5ml: UK teaspoon