A course I did covering a variety of stuff including filters suggested a steripen kind of disables any bugs, to the extent that hopefully they won't still do you any harm. However dead they may or may not be, they're still in what you're drinking!
PreMac filters use iodene, but then the carbon bit takes it out again.
The filter on the Lifesaver bottle has small enough holes to not allow any bugs through at all, and I believe there is a cleaning process to flush it within the filters lifespan? If there is nothing left after these holes, what is there to grow on the carbon bit? I'd not heard that before? Is that specific to a Lifesaver or generally?
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