Naturally, I choose the latest to expire to maximize my options within the consumption time-frame. And I think everyone does?
But do you actually care about food waste if every time you make that decision the earlier-stocked milks that are still around, and set to expire sooner, are pretty much guaranteed to not be purchased?
I guess I have no idea of the scale here, or even how much is wasted. It just seems like there would naturally be some sort of price-tiering of dairy products based on expiry to incentivize what might be a better overall consumption.