Get a squishy insulated bag, not a bento box

If you’re biking to work, the best lunch box is a soft-sided insulated bag you can squish into a backpack or pannier—not a bento box, not a hard cooler.

Bento boxes look nice on Instagram but they’re heavy and rigid. That’s the opposite of what you want when every ounce counts on the ride in. Hard coolers are worse—bulky cubes that don’t fit around anything and rattle against your frame.

A soft insulated bag weighs almost nothing, packs flat when empty, and bends around the other stuff in your bag. Look for a slim profile, a zip top, and light insulation. You don’t need to spend much. If you have a fridge at work, you barely need insulation at all—just something leak-proof to keep your lunch from soaking your laptop.

One practical tip: buy one that fits inside your existing backpack or pannier. Carrying a separate lunch bag means one more thing to balance and one more thing to forget on the bike rack.

Your legs will not miss the extra two pounds on the climb.