Electrical thermos and heat/cold cup slogan
The original is healthy, the most warm has been in my heart. For our own security protection, also is to the strong power of the body.
The thermos bottle into a vacuum between the two layers of glass, and destroys the condition of convection conduction. Hot water bottle caps to choose is not easy to heat transfer of cork, partition the convection heat transfer path. Perfect to heat transfer of three roads are blocked, heat can remain for a long time. But the thermos of insulation is not so ideal, there is still a part of the heat to run out, so the thermos heat preservation time have a limit.
Love in heart and considerate help health changes in temperature
