It isn't, unless you have a weird kind of cookie jar that I've never seen.
Yes. It is a screw action, which is a simple machine.
a screw
A cookie jar uses a screw.
a screw
A faucet handle and jar lid are simple machines.
A type of simple machine found on the lid of a pickle jar is a screw. Turning the lid either tightens or loosens the screw, allowing you to open or close the jar.
A cookie jar has a lid so it opens and closes.---- ----
It is a type of Nut and Bolt
Lever
inclined plane and screw
A cookie jar can use a simple machine like a lever to make it easier to access the cookies. By having a lid that acts as a lever, a person can apply a small force to lift the lid and access the cookies inside the jar. This simple machine helps in reducing the effort needed to open and close the cookie jar.
It isn't, unless you have a weird kind of cookie jar that I've never seen.