A case that can be rolled up and fastened with rubber.
This case is large enough to hold glasses, pens, highlighters, cutterknifes, and a 15cm ruler.
There are twelve holes on the case.
Thread the rubber string tight - using two holes on the pocket side to hold the U shape.
This will prevent glasses and pens from falling out when you open the case.
The rubber string will support the contents standing when used on a desk.
You can thread the rubber string through the remaining 10 holes freely, to hold eyeglasses, masks, notes, etc. in place.
It is a multi-purpose case like a toy that changes its mood depending on how you thread the rubber string.