Taller, deeper turnings are often referred to as vessels. Some vessels are hollowed through holes somewhat smaller than the maximum diameter.
All the wood used for my vessels comes from trees that were already dead and would otherwise have naturally returned to the earth. Some of the wood shows distinctive patterns called "spalting" that occur as molds and fungus consume the dead wood. When this decay is stopped in a timely fashion, it gives the wood beautiful color and lines not found in "healthy" wood.
For vessels, I use woods native to or naturally occuring in the North Texas area such as Ash, Walnut, Pecan, Cedar, Chinaberry, Sugarberry and Oak.