Bottle Warming

Any moms microwave their LO's bottle even just for few seconds to warm it up?

I absolutely hate the bottle warmer because it's either too hot or too cold and takes time. Running it in hot water also takes time-- especially in the middle of the night.

His bottle is already made since he I have certain amount formula mixed once a day and mixes it with pumped breastmilk. He hates it cold so I am looking for ways to warm it uo that does not take a lifetime and is not too hot or too cold.

Suggestions???