Silver vacuum flask on the bladder function.
First of all, that is not silver, aluminum, ginta expensive, can't afford to use. Keep heat out in the form of radiation, heat preservation effect. The lining of the vacuum, prevent quantity of heat by convection pass away. A silver thinks himself to be, that is because learning a little bit of silver mirror reaction. With a brain knows that silver is expensive, who can afford.
If, deep by the color of the object when the outside temperature is high, easy to heat, when it is lower than the ambient temperature is easy to heat. If the color of the object is very shallow, when outside temperature high, not easy absorption of heat, when it is lower than the ambient temperature is not easy to heat. If the object is silvery white, hot water temperature is higher than the outside world, it is not easy to heat, it'll be easier.
Keep heat out in the form of radiation, heat preservation effect
