Can the mug be cold in summer

- Sep 11, 2019-

Yes, the mug can keep warm, keep heat, and prevent external heat from entering.

The vacuum flask is generally a water-filled container made of ceramic or stainless steel plus a vacuum layer. The top is covered and the seal is tight. The vacuum insulation layer can delay the heat dissipation of the liquid such as water inside to achieve the purpose of heat preservation.