The top of a box might be a lid. If there is no lid, there may be flaps.
It is called the top of the box or it might be called the "lid".
It could be called a "runner"
The Plastic box and lid shop
What is required is force on the inside of the lid of the box that is greater than the force of air pressure on the outside of the lid.
measure the sides of the box
A cardboard file with a lid that opens like a box.
A cardboard file with a lid that opens like a box.
The subject pronoun it will take the place of the subject noun phrase 'the lid of the box': It was left wide open.
Hope
Hope
Under the fuse box lid