The Gold Fume pipe is the perfect size to slip in your pocket for a quick hit on the go. It is handmade from high-quality borosilicate glass that is fumed with gold and silver. The gold and silver are held in the flame during the glassblowing process. Fumed glass appears to change color over time as resin builds up inside, so your glass pipe's look will evolve as you use it. Thorough cleaning will return it to its original hues, so you can watch it slowly change all over again!