The Dual Chamber Beaker Tube from Red Eye Glass® features an iconic dual-chambered design with an 8 arm tree perc for top of the line smoke filtration. The Dual Chamber Beaker Tube from Red Eye Glass® features an iconic dual-chambered design with an 8 arm tree perc for top of the line smoke filtration. Each one is also made of 100% borosilicate glass for improved temperature resistance and durability.