This piece features a sleek and clear glass design that allows you to watch the layers stack as you smoke or vapor. The Grav labs 6 pipes feature various colored glass accents that give way to a unique and aesthetically appealing appearance that catches the eye. With a deep bowl to allow for a larger amount of dry tobacco or herbs to be packed at one time, this glass pipe is a must have for any serious smoker. Designed with thick, fumed glass, this Grav labs 6 pipe is much more durable than your average one which adds to its value and longevity. Because of the thick glass design, these glass pieces are less likely to break due to their heavy glass construction. Produced from the fumed glass design, the color will appear different based on if the light passes through the specialized glass. No matter what, fumed glass will change color due to the fact that it has been exposed to heat from the flame. So what started out as a clear pipe with a blue tint could change over time to be a clear pipe with a purple tint to it. This Austin-based company uses only high-grade, specialized glass to ensure a high quality product. Doing so makes all the difference because borosilicate glass is durable and made to last.