In my personal experience and opinion, these moving boxes are disappointing. The tape does not stick to the boxes, making them unreliable for transporting items (several tapes have been tested, and the only one that seems to hold so far is the brown tape). Although they are sturdy and appear durable, they cannot be used properly – first, because there is always the fear that they will open, and second, because they lack the necessary handles (holes) for hands. Transporting them becomes difficult and awkward, especially when they are full (Comment from the moving company). So I do not recommend them. "UPDATE" Ultimately, during the move, they opened.