If I'm going out & I take some liquid formula "just in case" & a sterilised bottle screwed together does the bottle stay sterilised until I undo it to use?
The microwave & electric sterilisers say the bottles stay sterilised for 24 or 8 hours as long as the lid stays on. So if I sterilise 2 bottles then remove 1 from the steriliser & put the lid back on does the other one stay sterilised or does it need redoing?