portable box / portable box

Plastic bags are an item that cannot be absent in our daily lives. Outtake food needs plastic bags, beverages need plastic bags,
and even shoe boxes
that have more sense of design uses plastic bags.
But this convenience leads to the destruction of the environment.
Therefore, just for a thought,using the only material of the shoe box “paper”, designing a shoe box that can just be carried
by the box itself. Designing the shoe box making it have more changes, and further, decreeing the burden for earth.