White Rhino Diffuser Beads are small non toxic plastic beads that go into a water pipe. Diffuser beads have many functions besides looking cool. Diffuser beads act as a percolator as they help break up the smoke for smoother hits. They also can help keep your water pipe clean and they scrap the inside of the water pipe helping to scraping any residue. Since diffuser beads are submerged in water, they never get hot.