Cooke & Lewis Adelphi RH Supercast acrylic Curved Bath (L)1675mm (W)850mm. Supercast is a revolutionary reinforcement process for an acrylic bath that brings all of the traditional properties of a cast iron bath into the 21st century. Supercast baths are manufactured from 100% cast acrylic which is warm to the touch, and easy to clean due to its high gloss finish. It has improved insulation helping to keep water hotter for longer, and in turn making them better for the environment. All of this gives the natural warmth and lightness of acrylic but with the durability of steel, and backed up by a 30 year guarantee.. Bath by Cooke & Lewis.