Created by a professional container gardener, these were designed to be an eco-friendly, indestructible, and low profile alternative to pot feet & trivets of all types.  The rubberized, 100% recycled material actually grips the pots and provides cushioning on uneven surfaces.  Use 4 PotRisers under each pot – they will support 1600 lbs!  Great for easy cleaning, discouraging bug infestation, and good drainage.