This pair of steel containers will meet the needs of most people who like to bring their lunch with them, keeping food fresh and safe. They are both lightweight yet incredibly strong and built to last a lifetime.. Made from high-grade stainless steel. Made from premium 304 grade stainless steel.. Responsibly made in China.. 15 year warranty.. Plastic-free.. Leakproof.. Dishwasher safe; cap hand wash only.. 1% of sale goes to environmental nonprofits.. Elephant Box founders Liz and Joy wanted to be part of the solution in the war against waste. By creating solid, well-designed products that last a lifetime, their aim is to help people buy better, and buy less. Off the back of a successful crowdfunding campaign in 2015, Liz and Joy created the original Elephant Box: a large, durable and lightweight clip-top. Since then, their range of quality stainless steel home products has expanded to flasks, cups, washing up bowls and more. Elephant Box believes strongly in giving back to people and planet, reflected in their carefully vetted supply chains and sustainable credentials.