Phoenix Star 18 Inches Freezable Coil Bong with 4 Showerhead Percs , a 18 inches glycerin bong with 18.8mm bong bowl, combines a beaker base with 4 showerhead percs and glycerin coil top part to offer powerful performance. Phoenix glycerin coil bong comes with detachable freezable coil to provide smokers cooler flavors when putting it in the refrigerator for one to two hours or more before inhaling. And this freezable bong is equipped with 4 showerhead percs to diffuse and filter the smoke to create more bubbles and more interactive surface with water after passing through the percs for smoother hits. The water will roll and bubble to create a "whirlpool" shape to let smokers be relaxed.