Feature: 1. 304 Inner Container: Inner container uses high quality 304 stainless steel with highly mirror polishing treatment, easy to clean. 2. Silicone Sealing Ring Design: Internal sealing ring, thickened and widened, and connected with plastic as a whole, not easy to fall off, good sealing and heat preservation effect. 3. Air Vent Design: High pressure cooker principle, pressing the air vent can seal the box, open the top air vent before open the lid, able to easily remove and clean. 4. Tight Cover: There are safety buckles on both sides of the lunch box, which can be fastened easily by pressing, and no need to worry that the lunch box will be loosened. The design of short clasp makes the lid and the body of the box close and safe to carry. 5. Ergonomic Handle: Arch handle with ergonomic design is more comfortable and convenient to carry, able to be pressed into the pack when not in use, elegant design, not occupy space. 6. About Sealing: Top of the lunch box has sealing ring with good sealing effect, there is no sealing ring on the bottom, liquid can be leaked, can not be filled with soup. Specification: Item Type: Thermal Lunch Box Material: 304 Stainless Steel Application: For Home, School, Office, Outdoor, Etc. Shape: Round Heat Preservation Function: Support Microwave: Not Available Heat Preservation Effect: About 1 Hour At Room Temperature 25℃ Environment. Package List: 1 x Thermal Lunch Box Note: 1. Please allow 1‑3cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.