To avoid food waste with food covers or containers, plan your meals ahead of time and only prepare what you can consume. Use the right size container for the amount of food you have. Store leftovers properly by cooling them down quickly and sealing containers tightly to prevent spoilage. Always check the contents of your containers before shopping to avoid buying duplicates. Use containers with clear labels to easily identify what's inside and its preparation date. Finally, rotate your food storage to use older items first and reduce waste.