Bathroom Furniture and Sanitary Ware Design Silvia Bathtub by Marmite Sp. z o.o. Silvia bathtub is inspired by the shape of a terracotta bath from 1700 BC and discovered in the palace of Knossos on Crete. Silvia is functional and ergonomic, so that it corresponds to human shape and is wider in shoulders and gets narrower towards feet. This shape also brings reduction in water use, from 280 to 130 liters. The overflow integrated in a thin wall is a solution that so far has not been applied in mass production. The bathtub is made of cast marble, with natural dolomite powder, ensuring warmth and comfort of use.