Was your lunch home made, supermarket bought but in date, or what?
Because I am bin happy and chuck any milk in our communal fridge that is more than one or two days out of date, and ditto anything else, in the bin.
Leads to little PA notes saying "I don't care my butter is a month out of date, leave it alone".
I don't chuck anything else that isn't growing mould, though. I am talking literally growing mould here.