Experience with Smart Pots? Can you make them?

[lakelady]

There's a felt factory near here, probably the last factory I even know of in my area. I always thought it was for commercial sales, and the other day my garden c enter had started decorating for Christmas with felt they purchased from there.

So, it got me wondering. How good ARE smart pots? They look like felt to me. Has anyone tried making them? Probably not very cost effective unless you can get materials pretty cheap, which I might, not sure yet.