Water pipes, or more specifically bubblers and bongs are always cherished by smokers due to their functionality. They make smoking smooth and comfortable. But how awesome it is when you get an option to customize your bong? That too not only while buying it but whenever you seek a change! STAX is the first all glass, modular smoking system from Grav Labs. Grav Labs is one of the highly respected names in glass manufacturing. Based in Austin, Texas, they are…