Comments:
I bought a couple of these to try out under my large pots on my pool deck. As others have said, they are barely noticeable, but they elevate the pots enough to allow proper drainage, allow for airflow, and make for easy cleaning around the pot. I have also found that although they don't adhere to the bottom of the pot, the rubber has enough surface tension that I can easily slide my pot around or rotate to ensure even sun exposure. I'm back to by a bunch more!