They are made with items from the garden centers of your local home improvement stores.
I can definitely do this!
Here are a few links for you...maybe you will get the hypertufa bug too!
Martha Stewart...Pots with a Personal Touch
Lowe's Home Improvements
D & G Gardens and Crafts
If you try this...please let us know. We'd love to see your handiwork too!
Maybe just one more...
Your friends at PHM!