I had this conversation with my girlfriend of a 1 week old last night, as she used to work in Childcare and said that they always heated up bottles in the microwave with no worries (EBM and formula) and that she wanted to check if it was ok for her to do this for her new bubby. I gave her the info out of the aba book and she is going to buy a bottle warmer! It's interesting though - I wonder if it is just common practise at most centres. I guess the risk with a container of hot boiling water is that it could be spilled onto a child? Is it an issue with formula or is formula ok to be used in the microwave?