Our all glass bowl is one part of a two-piece precision interlocking bowl and downstem system. By using laboratory ground glass joints we can combine the bowl and downstem elements into one simple system. These two pieces eliminate the need for rubber gaskets and multiple parts, which complicate and could contribute contaminates to the smoke. All you do is insert the downstem into the bowl for a perfect seal and a perfect fit. This bowl fits the Pod, Jar and Tank hookahs. Assembly and disassembly for smoking use and cleaning is quick and easy. Just insert the downstem (sold separately) into the bowl and it is ready for use. When you are finished, hand wash in hot soapy water for quick clean up.