Sterilising advice

Hi all, I'd appreciate some advice about sterilising bottles and milk-expressing equipment. I have a steam steriliser that I will use for both, my question is what to do with the items once sterilised so that they stay sterile - can i put them in a sealed container e.g. large tupperware and use them as needed or do I need to setrilise every time just before i use? Given that the steriliser does several bottles at once I'm presuming there's a way to keep things sterilised but maybe that's just wishful thinking!

Thanks in advance for any tips

I just put them in a tupperware container and as long as they weren't in there for too long after sterilizing, then I'd use them like that. If too long or not sure, then would sterilize again. If you have your own steam sterilizer, than why not just keep it in there until you need them?

I just leave mine in the sterilizer, and I make up all the bottles at once just full of boiled water and pop them in the fridge, ready to add the formula to it.