Some places might be reluctant to let you warm the bottle up because of fear of being sued if you baby gets burnt (very silly, I know!). At McDonalds once, my friend asked them to heat a bottle or for some boiled water to put the bottle in. They said they would do it but they had to take the bottle and warm it themselves in case she burnt herself. Isn't it silly how careful we have to be these days? When does common sense ever get a shoe in anymore??