Riddle

I hold the extra weight that your bag can’t.
I can be clean, or unorganized.
You know my code but sometimes you leave me open.
You sometimes forget me after the day is over when if you don’t need anything.
You are not the only person that has me.
You can to use me or carry your stuff yourself.
I never get tired holding your things.
Unless I am full, you can always use me when you need a place for your heavy load.
There are different types of me big and small.

I am the only thing that cannot lose your things once you put them in.
People use me to play practical jokes or sometimes to bully other kids.
I never leave a spot that I am put in.
What am I?

Adeshola Logunleko