This so caught my eye!! I am going to give it a try. It is made out of terra cotta pots.
The pots are turned upside down 14",12",10". The top is a 16" terra cotta saucer. The containers are are held together with acrylic based silicone caulk. Spray is used along with a sealant.The link for this is
theculinarycougar.wordpress.com