A rather flat box that reminds a bonsai vase, made by Katrin Shumakov. It requires a lot of precreasing, and it’s quite difficult, I hope you can understand from the diagrams and the video.
I made one with a 20cm square paper and one with 10cm. It’s actually very sturdy and looks very nice, tough I’m not convinced it will hold a bonsai.
On the authors website you can see some good examples made with 2 colored paper.
Paper to use
One single square paper. I used a 20cm wide paper. You get the best results with white on one side and colored on the other.