They can be stacked even when folded.
By folding the box when empty, you can make effective use of storage space (approximately 1/3 to 1/4).
All plastic Capacity: 34.5L
Material: PP (polypropylene)
External dimensions (mm): 530 x 366 x 221 (folded height: 86mm)
Effective internal dimensions (mm): 492 x 334 x 201
