Medusa | 17" Bubble Tree-Perc BongMedusa 17" Bubble Tree Percolator Bong Big, bold, and built for cleaner hits. The Medusa 17" Bubble Tree Percolator Bong isn't just another straight tube bongits a full on filtration machine disguised as sleek simplicity. Inside the main chamber lives a stacked tree perc system, where multiple arms work together to diffuse smoke into tiny bubbles. The result is more surface area, better cooling, and dramatically smoother hits that are easy on the