Daruma Biodegradable Pop-Up Kitchen Sponge by Zenco JapanBiodegradable Pop Up Kitchen Sponge by Zenco Japan. Recyclable pop up natural sponge, an environmentally friendly product that is ideal for kitchen cleaning. It has the same feel and functionality as a traditional sponge, but produces no plastic waste. It comes in a tracing paper package with a window to convey the feel of the material. Design Daruma. 100% Compostable. Directions: Place in water and the sponge will immediately expand. Dry completely