This bell shaped cloche porion is made of clear quality glass with a heavy glass knob on top to separate the glass from the base. The base of this terrarium is a rough, heavy, clay terra cotta. The top fits easily onto the base. The base has several rubber type small pads to protect the furniture it sits on. This is a true terrarium, letting in very little air and very little moisture out. When you need it to breathe, just offset the glass from the base slightly. You will only find this terrarium cloche on this website, FineWebStores.com and fine gift and floral shops. This makes a great gift and decor item.