good question. I use the platy gravity 2L and this thing is worth its weight in gold, period. I cant believe how many years back in the day all the water we consumed we actually boiled first (time time waiting to boil, then cool, + all the fire fuel and processing wood, my god).
That being said, while we are camping I leave it out the whole trip. If its cold at night flirting with 0 deg I will bring the filter into the tent and wrap it in a jacket or sweater so it doesn't freeze. I transport to and home in the mesh bag it comes in, but I feel like that will break soon (on third filter now). Curious to see what other people do with this