Eco-friendly food storage boxes high-quality food boxes are made from 100% food grade plastic, salvaged from the production of the original clear and coloured versions; the off-cuts would usually come off the machine and be sold on to make single-use items that might well end up in landfill, but Lock & Lock have created these eco containers to avoid wasting all that perfectly good plastic. They're helping the environment whilst maintaining all the same fantastic qualities as standard Lock & Lock products.