This 2D backpack is from another dimension. It took awhile for me to pull it out of a flat world, but I managed. I bought a few and used one while I was in the flats.
(Allow 4-6 weeks of processing.)
Some people managed to bring the flat world to earth, such as the 2D cafe's and restaurants from Korea to Japan. It must have taken a lot of work, but it sure united the worlds of the universe.