Skip the lunch box. Pack a hard-sided container.

The best “lunch box” for a bike commute isn’t a lunch box at all. It’s a hard plastic or stainless steel food container packed flat against the back panel of your backpack.

Soft insulated lunch bags are the problem. They crush under your laptop, your shoes, and your lock, and by 11 a.m. your sandwich is a flat, sad tortilla situation. No amount of clever folding fixes that.

Instead, grab a hard food container—Sistema, Lock & Lock, or a Japanese bento box like Monbento. They’re rectangular, slide into a backpack like a book, and actually absorb the abuse. Throw a small ice pack on top if you care about temperature, and you’re done. You don’t need a product that calls itself a “lunch box.”

One trick: if your backpack has a padded laptop sleeve, that’s the most protected spot in the whole bag. Ride your container in there, flat against your back. Never bury lunch at the bottom of the main compartment under your pump and dirty workout clothes.

If you really want something insulated, the Carhartt lunch box is decent and semi-rigid, but it eats real estate. The $12 hard container beats a $45 “commuter lunch bag” every time.

Your sandwich is only as safe as the flattest thing in your backpack.