That's a neat trick. However, I've never seen anyone doing it around me. I wonder how one would make it work with fridge and storage space regularly filled to capacity?

My wife and I do something else instead. We know we can eat all foodstuffs before their printed expiry date, but we got tripped regularly by products with have short expiry time after being opened - in particular, through not remembering how long such a product has been sitting in the fridge. I eventually glued some magnets to a permanent marker and put it on the fridge, and now we write current date whenever opening a fridge-stored product. This made it much easier to avoid accidental food waste due to uncertainty around spoilage.