The hot water bottle

- Dec 21, 2019-

The hot water bottle is made of double glass, both of which are silver-plated and act as mirrors to reflect back the heat rays, thus cutting off the passage of the heat radiation. By vacuuming the thermos between the two layers of glass, the conditions for convection are destroyed. The hot water bottle cap chooses the cork which is not easy to transfer heat, which cuts off the channel of convective heat transfer. By perfectly blocking all three paths of heat transfer, heat can be retained for a long time