Key Specifications & FeaturesMaterial: Food-grade 304 stainless steel inner container paired with a durable plastic outer shell.Capacity: Typically holds around 1.1 to 1.2 liters, distributed across a convenient double-layer meal grid layout.Heating Mechanism: Utilizes low-wattage, constant-temperature heating via a USB charging port, allowing you to warm up your lunch directly from your laptop, power bank, or car charger.Leak-Proof Structure: Outfitted with a secure lid lock and tight seal to prevent soup or moisture from spilling out during transport.