The soft bath tub can be realized with new flexible bath tub materials. When lying on it, it feels comfortable from its cushioning according to the body structure and its remarkable thermo keeping ability. Barco BATHTUB’s cooling down speed is a quarter of the normal bath tubs and helps one to feel warm and cozy like inside the mother’s body, even when they stay in the tub for a long time. Barco BATHTUB’s design is contrary to the soft feeling of the inside. The bath tub embodies the eidetic design of a paper boat. The angle of the straight lines and division of the face give the sharp feeling of a man, and it lets the user experience the ironic reversal effect.