100% Leakproof Lunch Box - removable silicone seal around the lid creates a leakproof seal. It also has two clips which secure the lid in place. Once it has reached the end of its life, our lunchboxes are 100% recyclable. The raw materials are melted, combined, formed, cooled and shaped. While the process needs to be supported by high heat, no toxic chemicals are released into the air in the process. Stainless steel is an alloy of iron and other elements including nickel or carbon that is highly resistant to corrosion. Making this lunchbox durable and long lasting. We are UK based, ready to answer any of your queries. Our mission is to provide households with eco-friendly alternatives. Each purchase helps us with our pledge to plant 1 tree a day through our partners One Tree Planted.