Amazing story

One lemon's story.

Now,my father ask my sister to make the tea for all member of family.
She look at cupboard, and take four cups(because we are four
member in family). When she look inside the cups to pour the welding,
she was very surprised, because actually she find surprise inside, :)
in cleaned cup from cupboard was a file of lemon.....
Who can guess by lemon?....:)