Thermos Flask

A Thermos Flask is a convenient item that helps keep drinks hot or cold for a long time. Below is detailed information about Thermos Flask, how to choose and use it effectively.

Structure and operating principle

• Structure : Thermos Flask bottles usually consist of 2 shells (plastic or stainless steel) and a vacuum layer in the middle to prevent heat transfer.
• Working principle : The vacuum layer between the two shells helps insulate, preventing the temperature inside the bottle from escaping or the outside temperature from affecting the inside.

Working principle

The Thermos Flask works on the principle of insulation. The vacuum layer and the shell of the thermos help prevent heat transfer by conduction and convection, while the inner tank has the ability to reflect heat, helping to keep the temperature inside the Thermos Flask stable.

Advantages of Thermos Flask

• Keeps drinks and food warm for long periods of time.
• Convenient to carry when going to work, school, picnic.
• Safe for health because it does not change the quality of drinks and food.
• Diverse designs and sizes, suitable for many uses.

Criteria for choosing a Thermos Flask

• Material : Prioritize 304 stainless steel or high-quality glass, safe for health.
• Capacity : Depending on usage needs (usually from 300ml to 1 liter).
• Heat retention : Choose a bottle that can retain heat for 6-12 hours.
• Design : Tight lid, easy to hold, with handle or strap.

How to use and preserve Thermos Flask

• Cleaning before use : Wash with warm water and soap.
• Pour hot/cold water into the bottle : To keep the Thermos Flask effective, rinse the bottle with hot water before pouring hot drinks, or cold water before pouring cold drinks.
• Cover tightly : Make sure the lid is tightly closed for best heat retention.
• Cleaning after use : Rinse with warm water, avoid using hard brushes to avoid scratching the surface.
• Not for microwave use : Stainless steel or insulated Thermos Flask bottles cannot be used in microwaves.