In the office I worked it was never an issue that we were out of milk. It was that people brought in their own milk cartoons and put them in the fridge, so others could have milk too. Nice. Thanks to whoever brought it!
But then nobody removed that cartoon from fridge so it started to stink, and remained in the fridge still. Then no-one in particual was eager to tackle the bad smell, it definitely was not their job.
I implemented the "three sticker rule" at my office. Every Friday, put a neon dot sticker on _everything_ in the fridge. Instead of putting a fourth sticker on anything, throw it out.
Because "anyone could do it", it usually ends up that "no one does it".
But then nobody removed that cartoon from fridge so it started to stink, and remained in the fridge still. Then no-one in particual was eager to tackle the bad smell, it definitely was not their job.