The Oiva spice grinder is made of white stoneware, and it features the Räsymatto pattern. The top-quality CrushGrind grinding mechanism has a 10-year warranty and it is suitable for both salt and pepper. We recommend washing the grinder by hand. This product is packed in a gift package.The Räsymatto (rag rug) pattern, inspired by allotment gardening, is linked to topical themes like sustainable living and the joy of working with your hands. Allotments, with their flower and vegetable beds, represent urban nature at its best, and a rag rug on the floor of an allotment cottage tells a colourful story of its own.