A thermos (or vacuum flask) is an insulated container that keeps beverages or food hot or cold for hours by using a double-walled, vacuum-sealed design that prevents heat transfer through conduction, convection, and radiation. Invented in 1892, these durable, often stainless steel, containers are popular for commuting, school, and outdoor activities.

A thermos (or vacuum flask) is an insulated container that keeps beverages or food hot or cold for hours by using a double-walled, vacuum-sealed design that prevents heat transfer through conduction, convection, and radiation. Invented in 1892, these durable, often stainless steel, containers are popular for commuting, school, and outdoor activities.A thermos (or vacuum flask) is an insulated container that keeps beverages or food hot or cold for hours by using a double-walled, vacuum-sealed design that prevents heat transfer through conduction, convection, and radiation. Invented in 1892, these durable, often stainless steel, containers are popular for commuting, school, and outdoor activities.A thermos (or vacuum flask) is an insulated container that keeps beverages or food hot or cold for hours by using a double-walled, vacuum-sealed design that prevents heat transfer through conduction, convection, and radiation. Invented in 1892, these durable, often stainless steel, containers are popular for commuting, school, and outdoor activities.

1. Black

2. White

3. Beige

4. Sand

5. Gold