I haven't used them myself. Interesting little video I found:
https://pottymouthplanter.com/ .
But I may have seen a "poor man's" version of one in the last couple years.
We recently bought a 42 acre getaway cabin property in Central Texas and the previous owner planted a pecan tree in the ground with a pot all the way around it, well submerged in the ground. I thought that very odd when I went to water the tree shortly after we closed on the place. But then we discovered gopher mounds everywhere and realized the previous owners must have been fighting gopher root damage to trees and shrubs. I had such damage occur with some dwarf variegated yaopons I planted by the front steps of the cabin. So suddenly it occurred to me an open-bottomed planting to defend against gopher damage made good sense! The pecan tree is 6'-7' tall and very healthy. So I wonder if the pretty Potty Mouth pots shown in this video could also be used for gopher defense, although the one she shows in the video doesn't have very deep sides.
BTW, we have gotten rid of the gophers effortlessly. We saw a red fox scurry in front of our car accessing the property last month. THAT must be who has excavated the deep 9" wide, fairly deep hole under said porch steps! Gopher and mole evidence seems to have gone away in the last few months. Problem solved without any cost whatsoever. LOL