portable stainless steel thermal lunch box, often referred to as a food carrier or insulated food jar. This specific model is popular for its compact design and ability to maintain food temperature for several hours. 

Key Features

• Material: Constructed with a 304 food-grade stainless steel interior and a durable PP (polypropylene) plastic exterior.
• Insulation: Designed with double-walled vacuum insulation, it can typically keep food warm or cold for 3 to 6 hours.
• Leak-Proof Design: Features a threaded swivel lid with an internal silicone sealing ring to prevent spills, making it suitable for soups and porridges.
• Portability: Includes a foldable handle for easy carrying and often comes with a built-in air hole to release steam pressure before opening.
• Capacity: This specific style is commonly available in sizes ranging from 710ml to 1.5L. 

Common Uses

• Office & School: A convenient way to carry home-cooked meals like rice, pasta, or soup.
• Travel: Ideal for picnics or long commutes where access to a microwave is limited.
• Baby Food: Frequently used as a thermos for keeping baby porridge or milk warm while on the go.