Postby Mama » Mon Jul 18, 2011 8:49 pm
I believe sterilisation has to do with killing the bacteria in the water. If your water comes from the mains (Thames Water) it has already been treated against most forms of nasty bacteria, and if you clean thoroughly, and you dry all the equipment well, there should not be a reason to sterilise at all I've read. That said, I sterilised the bottles for the first 5 months, and my child has never had a case of v&d ever. If your water comes from a tank or a well you need to sterilise until you are happy with his/her resilience to fight a potential killer like e coli.
I hope this helps.