Did you know that you can FREEZE milk?? Maybe I'm living on another planet, but, I never even thought of doing that!!
I just read a great article that says you can freeze milk for up to 3 months after the expiration date and it's as good as new! Just make sure it's in plastic jugs and pour out a bit of it to make room for expansion.
I have not tried this, so I can't say for sure that it works, but you can bet that if I find a great deal on milk, I'm not going to hesitate buying a few extras and FREEZE them!