I pumped on Friday night and Saturday night, and I wanted to freeze this milk. I left it on the counter for about an hour to get all the fat off the sides of the bottle. I was getting ready to pour it into the bags, and I smelled it. Both bottles smelled a little sour, but I went ahead a froze them. I should also note that the bottle from Saturday smelled a little sour right after I pumped. I'm wondering if I should just throw these bags out or if they are ok to keep.