If your looking for a smooth smoke, than look no further. This is freezable glycerin coil glass bong that features an inline diffused perc brought to you by Nucleus. This bong is awesome because the top part of the bong is actually detachable and can be put in the freezer to cool it down. The smoke goes through the coil and the outside of the coil is filled with glycerin which cools the smoke down as it passes through. This bong is no joke! It stands about 13 inches tall and has a 14mm joint size.