And unlike with plastic trays, with metal ones you can’t remove just ... but there’s nothing special about them. The Container Store’s Covered Ice Cube Tray makes 21 cubes.

Partially fill one tray way with water ... Metal will keep your food colder than glass, ceramic, or plastic containers because metal is a better conductor of energy. What do you think so far?

Schools in Needham, Massachusetts have cut down on their food waste by replacing their old cafeteria lunch trays with reusable metal ones and they're already seeing results. "Food service ...