Lunch Box - 0292678 (Sold Online, Available at Stores)Product Description : Airtight Sealing: Airtight lunch boxes have specially designed lids with silicone or rubber gaskets that create an airtight seal. This seal prevents air and moisture from entering the container, keeping the food fresh for a longer time. Leak Proof: Airtight tiffin boxes are usually leak proof, making them ideal for carrying gravies, soups, and other liquid based dishes without the risk of spills inside bags or backpacks.