Skip the built-in ice packs

The best lunch box setup is a well-insulated bag and a separate flat re-freezable gel pack, not a built-in ice pack.

Built-in ice packs sound convenient, but they’re a compromise. The whole bag has to go in the freezer, which means you can’t pack it the night before. They take up space even when you don’t need extra cooling, and if the sealed layer ever cracks, the whole lunch box is done. Cleaning them is also annoying.

A plain insulated lunch box with a removable gel pack is more flexible. You put the gel pack on top of the food, where cold air sinks, and you can swap it for a fresh one if you need longer cooling. Most good bags with thick insulation and a leak-proof liner keep food cold for hours with just one flat pack. The gel packs are cheap to buy separately and easy to replace.

The only time I’d consider a freezable bag like PackIt is if you’re carrying fragile stuff and want the bumpers. Otherwise, you’re paying for a gimmick.

A boring bag and a $5 gel pack will beat any built-in system.