Geometry of the TCO and MTCO. A) The flat sheet with crease patterns consisting of mountain crease and valley crease lines of the TCO. B) Folding motion of the TCO, demonstrating two stable states. C) The flat sheet with crease patterns consisting of mountain crease and valley crease lines of the MTCO. D) Folding motion of the MTCO, demonstrating three stable states. E) The geometrical parameters of the MTCO during the folding motion.