BPA-free doesn't mean plastic-free

For young kids’ lunch boxes, stainless steel is the safest material you can buy, and “BPA-free” plastic isn’t the free pass it sounds like.

To be fair, most name-brand bento boxes really are BPA-free — lab tests confirm that. But BPA was never the only problem. BPA-free plastic often swaps in a close chemical cousin like BPS or BPF, which are in the same estrogen-mimicking family. Or it adds phthalates to keep the plastic flexible. So the label solves a PR problem, not a chemistry problem.

The bigger concern is microplastics. Every plastic container sheds tiny particles, especially once it gets scratched, run through the dishwasher, or loaded with warm or acidic food. Polypropylene — the #5 plastic most bento boxes are made of — is one of the better plastics, but it still sheds. You can’t see it, but it ends up on the food.

If you want minimal worry, get a stainless steel bento box. Bentgo, LunchBots, and PlanetBox all make good ones. They’re safe, tough enough for a preschooler, and last for years. Glass is just as safe but heavy and breakable. Food-grade silicone is fine for little snack containers, but the main compartment should be steel.

Your kid won’t get poisoned by a plastic lunch box. But if you’re buying something you’ll use 180 days