Soup-proof lunch boxes don't exist. Get a jar.

Stop looking for a leakproof lunch box. The best way to carry soup or yogurt is a wide-mouth insulated food jar with a screw-on lid. Yes, that’s basically a thermos — but the difference is you can pack it in your lunch bag and then eat out of it. No separate bottle needed.

Every snap-lock lunch box leaks eventually. Even the fancy silicone-sealed ones are built for dry snacks, not watery yogurt. Liquids find the one weak spot in the hinge. On the other hand, a screw-top jar with a tight silicone ring is nearly idiot-proof.

If you wanted an all-in-one lunch box that does this, the OmieBox is the only one that gets it right — but it’s made for kids. For adults, your best bet is a small insulated food jar (like an 8 or 12-ounce one) sitting next to your main container. It’s just one more item, but it’s the only thing that keeps your soup from becoming a bag emergency.

Your yogurt will always win over a plastic hinge.