The previously used by me had boxing as a closure elastics. This had the disadvantage that these bands could get caught with neighboring boxes, if you took out a box. At some point they were then worn or even demolished. The new boxes will no longer need rubber bands, because you can hook the flap.
So far I have used almost all A4 boxes. As in the cupboard there was no room, I realized that almost all the things that I've done in these boxes fit into A5 boxes. In addition, in the larger boxes was too much air.
Therefore, I will replace as many of the old A4 boxes by the new A5 boxes.
