Or you'll poke your eye out! You could stick an old glove there, or a tennis ball, or cut a small section of a swim noodle.
You never know when somebody clumsy like me is going to bend over to pick something up and forget that bar is there.
I love the idea of stacking them securely that way. Mine blow around the yard so much that I had to train my retriever to retrieve them!! We have enough pots that if I stacked them this way and lined them up I could build a fence.
