I've been pumping for my dd. I've already pumped 10ounces today and when I just went for my third session it got a whiff of sour milk. Smelled the shield and sure enough it has a slight odor. I grabbed the wrong one this morning. The sour part will go in the milk right? So pump and dump? Luckily I am off tomorrow so I don't need bottles but I am so pissed at myself for wasting 15 oz of milk