For a man who's left home with refrigerated mother's milk bottles, the ordeal involves getting the bottle out of the fridge, warming it to exactly the right temperature via one of those monstrous bottlewarmer thingamajigs, giving it a good shake and then performing a few samplings to ensure it's properly warmed, not too cold or too hot in some places. Most of the time the temperature is inconsistent and the bottle requires a little more warming or time to cool off.
Finally a proper-temperature bottle is presented to the baby, who meanwhile is crying his socks off, pretty convinced at that point that a 3-minute delay means eternal starvation for the rest of his short life. Getting the baby back to the happy state is significantly more involving and time-consuming at this point.
This also assumes that baby will be perfectly fine with 1 bottle, and not 1.3 or 1.7 bottles (which doubles the time requirement for the procedure).