Thanks all, it's all very confusing, the tin I have (amtamil) says it has to be made and used straight away, as it can start creating bacteria in the bottle, is this just the makers being over cautious? X
I think so to be honest ... what you have to remember is that the instructions on the box have to comply with World Health Organisation guidelines - which basically allows for the fact that formula is sold all over the world, including places where access to fridges is limited or non-existant.
Here in the west we have access to excellent and reliable refridgeration ... your mother's generation always made up bottles in advance with no ill effects
Tattie makes up bottles twice a day .... once in the morning and once mid/late afternoon so they are never stored for longer than 12 - 14 hours and she uses aptamil as well