tyhjiöpulloon
A tyhjiöpullo, often referred to as a vacuum flask or thermos, is an insulating container designed to keep its contents at a stable temperature for extended periods. It achieves this by minimizing heat transfer through conduction, convection, and radiation. The primary component of a tyhjiöpullo is a double-walled vessel, typically made of glass or stainless steel. The space between these two walls is evacuated, creating a vacuum. This vacuum is a poor conductor of heat, significantly reducing heat transfer by conduction and convection.
To further enhance insulation, the inner and outer surfaces of the double walls are often coated with
Tyhjiöpullot are widely used for storing hot beverages like coffee and tea, as well as cold drinks