Steel beats plastic for lunch boxes

Stainless steel lunch boxes are safer than plastic for avoiding BPA, phthalates, and the rest of the chemical alphabet soup — steel is inert, and plastic keeps inventing new things to worry about.

The short version: steel doesn’t need any of that stuff. BPA is used to harden polycarbonate plastic, phthalates are used to soften others, and the “BPA-free” replacements (BPS, BPF) are turning out to look just as suspicious in studies. Stainless steel is just iron, chromium, and nickel alloyed together. There is nothing in it to leach.

Two caveats. First, the lids are usually plastic — make sure they’re polypropylene (#5) and BPA-free, or swap for a silicone or glass lid if you’re extra paranoid. Second, buy food-grade 18/8 (304) steel. Cheap unknown-grade stuff is fine in practice, but why gamble? Also, don’t store acidic food like tomato sauce in it for days. That’s a flavor issue, not a health one.

Bonus: steel doesn’t absorb odors, doesn’t stain, doesn’t warp in the dishwasher, and survives being dropped more than once.

Your food should taste like food, not like a chemistry experiment.