Pottery made of porous clay and fired at relatively low temperatures of up to 1,200°C/2,200°F. It does not vitrify but remains porous, so will continue to absorb fluids. Earthenware may be unglazed (terracotta flowerpots, wine-coolers) or glazed to give a smooth, shiny, waterproof surface (most tableware); the glaze and body characteristically form quite separate layers.