First photograph is a full tank shot. It's 13" cube handmade.
I have thought about making them to sell but they'd be expensive, the time to build and then fire.
But the cool thing is I could pretty make them to any specs including small, or to fit in a corner. I even figured out a way to give them a kind of natural appearance.
Below is another Claytower I made actually an earlier one so was still working on technique. It's filled with compost and peat, too much nutrients I think.
I make little cups in clay for surface islands
An island in a corner tower.
I'll post some other clay pictures later.