What plastic numbers should you avoid?

Which Plastic Numbers Should You Avoid?

When it comes to food storage, not all plastics are created equal. If you’ve ever flipped over a container or bottle to check that tiny number inside the recycling symbol, you’re on the right track. But knowing which ones to avoid can make a real difference for your health.

PVC (3), often labeled with the number 3, is one to steer clear of. Commonly used in cling wraps and some bottles, it can release harmful chemicals like phthalates over time—especially when exposed to heat or fatty foods. These substances have been linked to hormone disruption and other health concerns.

Then there’s polystyrene (6), recognizable in foam takeout boxes, coffee cups, and disposable plates. This plastic can leach styrene, a compound flagged as potentially carcinogenic, particularly when heated. Even short-term use with hot food isn’t ideal, so it’s best to skip it when possible.

Finally, be cautious with some plastics labeled number 7. This category is broad and includes polycarbonate plastics, which may contain BPA—a chemical tied to developmental and reproductive health issues. While many manufacturers now offer “BPA-free” versions, some substitutes may carry similar risks. If you see “PC” in the labeling or aren’t sure what’s inside that number 7, it’s safer to opt for alternatives.

Instead, look for plastics labeled 1, 2, 4, or 5—especially if they’re marked as food-safe and designed for reuse. Even better? Switch to glass, stainless steel, or ceramic for long-term storage. Small changes in your kitchen can lead to long-term peace of mind.