Stainless Steel Vacuum Flask

The Thermos flask works based on the principle of insulation. It consists of two walls, typically made of stainless steel, with a vacuum between them. The vacuum serves as an excellent insulator, preventing heat transfer by conduction or convection. The inner and outer walls are also sealed tightly to minimize any heat exchange through radiation.The Thermos flask works based on the principle of insulation. It consists of two walls, typically made of stainless steel, with a vacuum between them. The vacuum serves as an excellent insulator, preventing heat transfer by conduction or convection. The inner and outer walls are also sealed tightly to minimize any heat exchange through radiation.