Question about feeding?

I am planning on pumping for my daughter if feeding doesn't work out.. it didn't go so well with my son. The problem I had before when I did this is that I had to obviously freeze a lot of milk when I pumped it. So then, I had to remember to thaw it out every few days or so. Then, I had to let it get to room temperature.... My question is.. is there somethign I am missing here? Is there an easier way to get it from the frozen to warm stage? I don't really like the bottle warmers bc they take too long to warm the bottle. What do you do?