This is a pokeball shaped storage/display stand to organize pokemon cards. It is designed for these deck boxes: print in place book box by Mimi home decoration - MakerWorld

I printed boxes in different colors that correspond to various energy/types: Fighting, Electric, Fire, Psychic, Water, Grass, Darkness, Metal, Colorless, Dragon, Fairy, and a grey box for trainers. In total, there are 12 box slots.