Why does a lightning rod have a sharp point for a top and not a rounded top? Explain.?
Rather than rubber feet, you can buy rolls of non-slip rubber sheeting. You can cut pieces of this and stick to the bottom of the boxes. It's far less expensive, than rubber feet as you will be able to get hundreds of pieces out of one roll , it is flat, so the boxes will be stable, and it is very much more effective.
