Heavy Use Masher & Good for grinding use it for grinding and crushing herbs, spices or medicine. It is non-porous, natural and very durable. ? Easy to maintain/clean, dishwasher safe and won't absorb food odors or stains. Made From Food Grade Stainless Steel Material. Most of available "Mortar and Pestle" n are made from Aluminium and it is bad for health - So go with non toxic food grade RJ kitchenware store Mortar and Pestle"