Key FeaturesInsulation: These containers use double-walled vacuum insulation technology to maintain food temperature.Material: The interior is typically made of 304 stainless steel, which is rustproof, hygienic, and robust, while the exterior is made of PP plastic.Versatility: They are suitable for both commercial and household use, often sold in sets of three with varying capacities (e.g., 1.5L, 3L, and 6.5L).Portability: Many models include secure lids with carrying handles, making them ideal for picnics, office lunches, or travel