I have a Sawyer water filter that works REALLY good for me. Previous to that I had a Pure Hiker pump type filter for the previous 20 years.

I have always filtered all of my water but this year I am going to be on a November elk hunt where the temps could potentially be down in the 18-25 degree range at night. It is my understanding that if a water filter freezes it is ruined. What do you guys do with your drinking water in late season hunts? I don't care fore the purification tablets due to the fact that Iodine repeats on me and gives me bad heartburn and boiling drinking water would consume too much fuel.

Please give me your thoughts...