Why is it that a magnet is applied to the lid of the thermos cup to keep warm?
The function of heat preservation is mainly because the silver cup in the thermos cup can reflect the radiation of hot water, and the vacuum of the cup and the cup can block the transmission of heat, while the bottle which is not easy to pass through the heat can prevent the heat convection.
So, put a magnet, not in fact to play a thermal insulation, but in order to make the water magnetization.
General statement: put on the lid and bottom magnet, between the cups will form a magnetic field with magnetization, mineralization and activation of tap water, very suitable for health; purification of heavy metal in tap water to drink, no hidden dangers.
