Originally Posted by
fuzz2050
Freezing doesn't kill microbes, at least not usually, it does tend to prevent their growth though. It's why you have to thoroughly cook frozen food and then let it cool back down, you can't just heat it up to the temperature you want.
However, ******ing microbial growth is usually enough. I store my bottles empty and open, and they don't go funky. Camelback's can be tricky to get air flow in, so I usually just roll them up and stick them in the freezer.
depends on the temp. sometimes i throw them in the -80c (-112f) at work and that should kill everything. should up on bike, dump water over the flower outside the building and through in freezer while walking by. yeah, maybe a household freezer won't work, but even -20C should do a reasonable job.