Trust the recycle code, not the BPA-free sticker

The fastest way to tell if a lunch box is food-grade safe is to flip it over and look at the recycling number on the bottom — not the label on the front.

The “BPA-free” sticker is mostly marketing. The FDA banned BPA in baby bottles and sippy cups, but it’s still allowed in adult food containers, and manufacturers know the word sells. Worse, some BPA replacements like BPS are just as questionable. So that label alone doesn’t tell you much.

The number tells you more. You want a #5 (polypropylene) — it’s food-grade, durable, microwave-safe, and doesn’t contain BPA. Also fine are #1, #2, and #4. The one to avoid is #7, the “other” category. That’s where polycarbonate, the plastic that actually leaches BPA, hides. If you see #7 with no other explanation, don’t trust it.

Also look for the little glass-and-fork icon. That’s the official food-grade symbol — if it’s there, the container was made to FDA standards. And if the plastic looks cloudy, stained, or warped, replace it. Cracks and heat damage break down the material and release whatever is in it.

Stainless steel is the honest answer here. An insulated steel lunch box skips the plastic guessing game entirely. When in doubt, that’s the move.