A couple of years ago the floor in my sewing/craft room collapsed - partly due to the weight of my fabric and old age and poor construction. So, I had to rush to WalMart and buy huge plastic totes - 28x16x12 - with a plain snap-on lid. I started loading each shelf in my big fabric closet into a tote. It was way too heavy for me to lift - so had my DH to start moving them out so that the carpenters could start working on the floor. He just about could not lift the tote and when he did the lid popped off. So, had to take back the huge plastic totes and get smaller ones - this time with locking lids on them. I did keep a few of the larger totes and put yarn in them as yarn isn't very heavy.