Leakproof lunch boxes are a lie. Get a screw-top jar.

A clip-lid lunch box is not leakproof for soup. You want a wide-mouth insulated food jar with a threaded lid, or a dedicated liquid-tight glass container. That’s the whole answer.

Here’s the thing: most “leakproof” lunch boxes seal well enough for a sandwich or apple slices. The moment you put liquid in them and toss them sideways in a backpack, the clips give out or the gasket shifts, and you’re washing your laptop. It’s not a seal, it’s a hope.

What actually works: wide-mouth food jars from Thermos, Stanley, Zojirushi, or Hydro Flask. The screw-on lid with a silicone gasket is genuinely liquid-tight. Wide mouth matters because you’re eating out of it directly. Insulated matters because soup should still be soup at noon. If you want room-temp yogurt or cold food, the same jars work fine — or get a glass container with a clamp-and-gasket lid, but only the kind where the lid screws or latches tightly, not the flimsy hinge kind.

Practical rules: don’t fill it to the brim — leave headroom so pressure doesn’t force liquid out. Pack it upright. And if you really can’t risk it, bag the jar in a ziploc as a backup. That’s not paranoia, that’s a Tuesday.

Your backpack’s “water-resistant” lining is not a backup plan.