  Origami has recently received significant interest from the scientific
community as a building block for constructing metamaterials. However, the
primary focus has been placed on their kinematic applications, such as
deployable space structures and sandwich core materials, by leveraging the
compactness and auxeticity of planar origami platforms. Here, we present
volumetric origami cells -- specifically triangulated cylindrical origami (TCO)
-- with tunable stability and stiffness, and demonstrate their feasibility as
non-volatile mechanical memory storage devices. We show that a pair of origami
cells can develop a double-well potential to store bit information without the
need of residual forces. What makes this origami-based approach more appealing
is the realization of two-bit mechanical memory, in which two pairs of TCO
cells are interconnected and one pair acts as a control for the other pair.
Using TCO-based truss structures, we present an experimental demonstration of
purely mechanical one- and two-bit memory storage mechanisms.
