Eco + sandwich box' is just the right size for a sandwich. The box keeps the contents in motion, the contents are not crushed and the bag remains clean. The box and lid are tightly connected so that nothing is lost. Ideal for a light lunch such as a sandwich or toast, or for cut fruits or vegetables. Children can open the box on their own. The sandwich box is environmentally friendly and made of the new ECO + material, which is a new plastic approved for use in food and made from recycled disposable packaging. Had it not been for this use, the disposable packaging would have reached a landfill or crematorium, whereas in this way it would have been given new life. We are the first Tupperware to use this innovative plastic, which is recycled and yet safe to use in food. The term reuse takes on a whole new meaning here! Safe instructions for use for the dishwasher. Safe to use in the refrigerator. Not suitable for microwave use.