Originally Posted by Cyclman
It's like how long can you go before pitching yeast into your wort. It just depends how much chance you want to take of an infection. The longer, the greater the chance.
Not really, if the bottles are sanitized leaving them upside down in a clean dishwasher or covered with foil will leave them sanitized indefinitely. Bacteria can't crawl or spontaneously form, it move around on fingers and surfaces and dust particles. It should be fine to leave the bottles in there as long as you need to.
Wort is different because unless you're no-chilling properly or being very thorough about protecting your wort from dust particles you likely have a tiny bit of bacteria/wild yeast in there and it's good to pitch your huge population of brewer's yeast to overwhelm the possible contaminants before they get a foothold.