Is 6 plastic good?

Is Plastic #6 Safe for Food? Not Really.

When it comes to storing food, not all plastics are created equal—and knowing the difference can make a real impact on your health. You’ve probably seen a small number stamped inside the recycling symbol on plastic containers. That number tells you what type of plastic it is, and more importantly, how safe it is for food use.

Plastics labeled with a #6 are made from polystyrene, commonly known as PS. You’ll find this in foam takeout containers, disposable cups, and some rigid food packaging. While convenient, it’s not recommended for food storage, especially when heated. Why? Because it can leach harmful chemicals like styrene—a substance linked to health concerns with long-term exposure.

On the other hand, plastics labeled #4 (LDPE) and #5 (PP) are much safer bets. LDPE, found in bread bags and plastic wraps, is flexible and generally stable. PP, or polypropylene, is strong, heat-resistant, and widely used in microwave-safe containers and yogurt tubs. Both are considered safe for food contact under normal conditions.

So what’s the takeaway? When you’re choosing or reusing plastic containers, skip the #6s. Look for #4 or #5 instead—especially if you’re storing leftovers or heating food. A quick glance at that little recycling number can go a long way in protecting your well-being.

In a world where convenience often wins, making small, informed choices helps. Opt for glass or stainless steel when possible, but if you're using plastic, make sure it's the right kind.