I am starting back at work on Monday and am trying to figure out instructions for our babysitter. I am planning on pumping at work (have already been pumping once a day) and am wondering what is the best way to prepare a bottle of breastmilk? Is it better to heat the breastmilk in the storage container and then transfer to bottle or go ahead and pour in the bottle and then heat?? Also, what is the best way to heat the milk to ensure no antibodies are killed in the heating process? Running under warm faucet? bottle warmer? (I heard if it's too hot it can do this).