Reusing food packaging can be okay, but it depends on what it's made of and how you use it. Glass and certain plastic containers, like the ones made for reusing, can be safely used again. Metal cans and clean cloth bags can also be reused. However, single-use plastic containers, cardboard or paper packaging with food stains, plastic wrap, and disposable plates or cutlery are usually not safe to reuse for food. Always clean and check the packaging, and use materials that are meant for reuse to stay safe and clean.