The recycling number matters more than the 'BPA-free' label

To know if a lunch box truly BPA-free, flip it over and look at the recycling triangle — don’t just trust the store label.

“BPA-free” is mostly marketing these days. It’s true that a lot of brands have switched away from polycarbonate, but the claim isn’t tightly regulated, and it tells you nothing about the other chemicals in the plastic. The number inside the triangle is your real clue. Avoid #3 (PVC, often has phthalates), #6 (polystyrene, the Styrofoam stuff), and #7 (the catch-all — it includes polycarbonate, which is where BPA comes from). If a #7 container says “BPA-free” specifically, it’s not polycarbonate, but it still might be a mystery blend.

Safer choices are #2 (HDPE), #4 (LDPE), and especially #5 (polypropylene). Those don’t have BPA in the base plastic, and polypropylene is what most decent plastic lunch boxes use. Still, no plastic is perfect — additives like plasticizers and colorants can show up in any of them. So the real rule is: if it’s going to be heated, washed in boiling water, or holding acidic food for hours, plastic is the weakest link.

If you can, go with stainless steel, glass, or silicone for actual food contact. They’re easier to clean and you’ll never have to memorize resin codes again. This is not where you save six bucks.