If it lasts for more than a week then it's had some weird shit done to it. Where I live, shit like that is frowned upon. We only drink milk that is atleast somewhat natural. I live down the hill from a farm and get most of my milk from the farmer. I also get pork, chicken, eggs and turkey from him. He smokes his bacon like none I have ever tasted. Really, really great. If you live near a farm then go and buy some shit from him. You'll thank me.