Get a soft tote, not a hard cooler.

The best teacher lunch box is a soft, zippered insulated tote that squishes onto the fridge shelf and opens with a whisper, not a snap.

Hard plastic lunchboxes and latching coolers are your enemy here. They don’t fit on crowded staff-room shelves, and every flip of the latch echoes through the room. A soft-sided bag slides into gaps, and a fabric zipper is the quietest way in.

You don’t need anything fancy. A classic insulated lunch tote with a zipper — the kind LL Bean and Lands’ End have sold forever, or even a decent Amazon Basics bag — does the job. It lies flat, holds a day’s food, and won’t wake anyone up at lunch.

Inside, skip crinkly wrappers and pop-top containers. Use silicone stretch lids on your bowls and reusable sandwich bags. That cuts the noise even more.

Your coworkers will thank you for not sounding like a chip bag at 11:45.