I had purchased, at Walmart, at least ten of the 38 quart containers which Sterilite used to make. They were good and solid, well designed, and have lasted well. I needed more and was distressed to find that the old style are no longer available. But 40 quart is pretty much the same size as 38 qts. so I thought I would try these. I am sad that I did. These are flimsy and do not stack well. There is more waste space between units when they are stacked and the tops will not hold the weight of another box on top. I cannot imagine why Sterilite reduced the quality of their product. If it costs more to make the old kind they should have raised the price instead of producing a product as bad as this one. My suggestion, DO NOT BUY THIS PRODUCT.