Double Blown Falacy

Double Blown Falacy

As long as glass has been used as a smoking device, there has been a story about "Double Blown Glass".  This is a made up term to describe thick glass.  The idea is that somehow two layers of glass are adhered to make it thicker.  There are techniques that use this as a method to create different effects but not thicker pipes.  The way that is achieved is by starting with a thicker tubing, or a larger diameter.