This is an AILIJIN stainless steel insulated food flask or bento box. Key features include:
Insulation: Double-walled vacuum insulation keeps food hot or cold for several hours.
Material: Made from food-grade 304 (18/8) stainless steel, which is durable and non-toxic.
Design: Features a leakproof design with multiple layers or inner containers for separating different foods, and a portable handle.
Capacity: Available in various capacities, commonly around 1.5L to 2.6L.