cerapotta: Pure Coffee Brewing through Japanese Porous StoneImmerse yourself in the world of exquisite coffee with cerapotta's unique coffee filter. Crafted from Japan's porous stone, this minimalist marvel refines water and coffee flavors. Say goodbye to wasteful paper filters and unlock the true essence of your favorite brew. Please note, this set includes both the cerapotta filter and the stand. How different with the other porous filter? 1. Materials The main ingredients of cerapotta are: clay + alumina