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. Easy to Carry: This leakproof lunch box ideal for picnics, camping, gym, travel and is also great for everyday use in the office or school. Food Grade Material: High quality food grade stainless steel liner and eco-friendly PP outer, BPA free, shock resistance, corrosion resistance, not rust and super durable. 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. 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. Feature: 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. Easy to Carry: This leakproof lunch box ideal for picnics, camping, gym, travel and is also great for everyday use in the office or school. Food Grade Material: High quality food grade stainless steel liner and eco-friendly PP outer, BPA free, shock resistance, corrosion resistance, not rust and super durable. 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. 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. 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