Stones Diffusion is the new diffusion system for virtually any water pipes and hookahs. Fill your water pipe, or hookah with the STONES to eliminate big bubbles, and generate smaller diffused bubbles for a much smoother smoke. In addition, Stones Diffusion carry a perfect balance of diffusion and drag resistance. The STONES are made from 100% recycled glass, are extremely durable and can tolerate major temperatures just in case you might want to freeze them! Furthermore, Stones Diffusion, are very easy to clean and maintain.