Something I've been wondering about for a long time- if I have a bottle of freshly pumped milk in the fridge, then I want to move it to a bag to freeze, usually the thick fatty parts are stuck to the side of the bottle while cold. How do you make sure to get all that good stuff when you pour into the freezer bag? I usually run the closed bottle under hot water just so the bottle itself warms up, and the solid parts swirl into the rest of the milk. But I'm definitely warming it up a little. Problem? Is there any easier way?