My love drilled a hole into the lid using a glass and tile bit so it doesn’t snag the metal. It leaves a nice, clean-edged hole. We went ahead and put a grommet on it anyway. It just looks more finished that way.
I pulled the end of the twine through the hole in the lid and it really helps keep the twine in check. I’ve already started using them in the garden to build my trellises. It’s as functional as it is beautiful, which in my garden makes it a winner!