||High-quality colored glass gives a beautiful appearance.
||High-quality clear glass allows you to watch the liquid rush around the tight waterways and bubbles stack as smoke/vapor rushes through the percolators.
||You can pack a lot more dry herb into a deep bowl, perfect for groups and huge hits.
||The neck is bent at an angle better suited for inhaling from the bong. A bent neck means you don't have to bend yours. Bent necks also help act as a splashguard.
||The downstem is the glass tube which delivers the smoke from the bowl to the bottom of the bong. This specific type of downstem is fixed to the bong.