This is made of cardboard. It works for our us because we put 2 on top of a very sturdy shelf, side by side, just to put books in. I would think if you are going to stack like the picture shows, you wouldn't be able to put anything heavy in it because it is so lightweight and just thick cardboard. It was easy to put together and has stayed together. We think the price of 38.99 is too high and if we had known it was so flimsy, we would not have gotten them, but it's too much of a hassle and expense to return and it's the right size for our use, which was difficult to find.