A Fridge Inventory for Shared Houses

The idea

In every shared house I've lived in, someone eats your labeled leftovers and someone else's milk goes bad because nobody remembers whose turn it was to buy it. I want a small whiteboard-sized touch panel that sticks to the fridge where people log what's theirs and set an expiry, so there's no guessing or awkward group chat messages about missing food. No app to open, just a screen that's already there when you're standing at the fridge.