Tomorrow I got into the dentist for a broken molar that has a filling in it. So for just in case I'm going to pumped some milk for my son. I just tried the bottle on him for the first time so he knew what it was. Little turd ate a whole oz (all I pumped) and then wanted the boob. So in the morning he doesn't flip a lid not knowing what the heck his grandmother is trying to put in his mouth he did great with it once he figured out there was milk coming from it. Using the slow flow nipples from medela that goes with my pump.