[structure and composition] bath sponge, bath ball, bath towel, face towel, silicone baby nose aspirator, silicone shampoo brush... Bath treasure uses 304 stainless steel bellows with strong thermal conductivity as the heat transfer medium. On the basis of strengthening the heat exchange efficiency, it is reasonably and evenly distributed inside the product, and the external part is made of PPR engineering plastics with excellent corrosion resistance, wear resistance, compression resistance and heat preservation Material, greatly improve the product performance and service life. As for the bathroom floor, tap water enters into the inner cavity of the heat exchanger, and people stand on it. The waste water after shower flows through the surface of the heat exchanger evenly through the holes on the panel. The heat energy contained in the waste water is transmitted to the cold water in the inner cavity through the tube wall of the heat exchanger, which greatly increases the temperature of the cold water. Then, the heat transfer process is continuously circulated through the water heater or water mixing valve through the outlet of the heat exchanger, so as to reduce the heating power of the water heater or the hot water consumption in the water mixing valve, thus achieving the purpose of energy saving. The temperature of the shower is generally about 48 degrees, and the temperature of the waste water after the shower is about 40 degrees. For the cold winter, the temperature of the cold water is only 3-8 degrees, In order to increase the cooling water from 3 to 8 degrees to 48 degrees, the water heater needs to increase the energy of 40 to 45 degrees. The bath treasure can absorb most of the energy of the wastewater around 40 degrees, so that the 3-8 degrees of cold water can be raised to 20-30 degrees. In this way, the water heater only needs to increase the energy of 18-28 degrees. Compared with the original water heater needs to increase the energy of 40 ~ 45 degrees, the energy saving effect reaches40~60%。