A little-known area of Shuzo Fujimoto’s origami designs are his corrugations. He published several dozen designs, based both on square and triangle grid, long before corrugations became popular in the origami community. Despite this, he is rarely associated with the genre. Here is a nice example of his corrugation, which looks like a candy when rolled into a cylinder (this is the form he most often used for presenting finished corrugations). There is practically no free space inside as the opposing sides of the model touch along the central axis. The model is very sturdy and holds together well without the use of glue.