I've just been putting the sippy cup in the dishwasher now and using tap water too.
HV said it doesn’t have to be sterilised on the course I was on last week
I just give my baby cool kettle water whenever he eats solid food (: x helps to digest it better
I offer water every time I give my LO solid food :) it can be regular tap water and the beaker doesn't need to be sterilised, just warm soapy water. I think the guidance is also no more then 30ml :)