Hanni cocoon cleanse's bff - pebble dish. A modern, minimalist dish made of diatomaceous earth that provides a perfect home in the shower for cocoon cleanse. What is diatomaceous earth? An organic material; a type of sand made from fossilized algae; a completely natural and renewable resource; a highly absorbent and quick drying; prevents microbial growth due to the delicate nature of diatomaceous earth. Please be sure to place your pebble dish in a secure area, away from the direct stream of water.