“∞”: as a number of snake cushions are connected with one another serially, various angles can be adjusted to form a storage space for all sizes of cells within the storage box. Robust: the independent internal buffer system composed by snake cushions provides excellent protection, even when the external box is already damaged. Reuse: he external box is reusable. Snake cushions and plates use same material, which can be 100% remodeled from idle boxes. Economic: snake cushion minimizes tooling costs, but maximizes usability for all sizes of boxes. Moreover the hollow space can save material costs up to 35% compared with existing models.