Abstract: A water distiller for distilling contaminated water is disclosed, the water distiller comprising a first container, for containing contaminated water, the first container comprising a first base and a first wall, upwardly extending from the first base, an outer cover, a water collection unit, preferably an outer container, and an inner cover for enclosing a volume in the first container, which inner cover comprises at least one aperture and is positioned below the outer cover, wherein the inner and outer cover are designed for transporting condensed water to the water collection unit, preferably an outer container, and wherein the outer cover is transparent for heating the contaminated water in the first container by sun. The invention also relates to a method for distilling water, to specifically shaped outer covers and/or inner covers and their use in distilling contaminated water.