The Cooper is a VZ Hookah model with a stem made of pure copper, offered in two heights — 50 and 63 cm. The stem system is non-disassemblable and consists of three tubes and a washer with side clamps for attaching to the flask; a spring on the stem acts as a heat sink, and a hook is provided for holding the hose. The diffuser is removable, and the hookah can be carried by the stem without the flask coming loose from the base.