Material: Built with food-grade 304 stainless steel inner lining and a durable plastic outer layer.Leakproof Design: Each container has an independent lid fitted with a sealing silicone ring to prevent spills.Temperature Control: Utilizes multi-layer PU foam insulation combined with an insulated bag to preserve food heat for hours.Capacity Variations: Typically includes two larger bowls (approx. 510–600ml) and two smaller bowls (approx. 360–440ml) to split up main courses and sides.