"Origami Square Interlace Box, designed by Michał Kosmulski and folded by me from 1 sheet of Tissue-Foil, black, 28.4 x 28.4 cm (lid) and 1 sheet of Tissue-Foil, black, 20.6 x 20.6 cm (box). Time spent folding: ~ 2 hours.
A video folding tutorial for this model was kindly provided by Sara Adams. You can watch it here: https://www.youtube.com/watch?v=rz1SftCue5I"